Years ago, a series of terrible incidents occurred at Tenjin Elementary. Mysterious accidents, disappearances, and murders finally resulted in the school being closed and torn down. In its place, the high school Kisaragi Academy was eventually erected, and Tenjin became the stuff of bad memories and ghost stories...Like the ones Ayumi loves to tell her classmates, much to Satoshi's dismay. No matter how much he tries to be brave, he still spooks easily... and his childhood friend Naomi's not much help, either, giving him even greater grief whenever he gets frightened. Thanks to their teasing, Class 2-9's cleanup after their culture festival takes much longer than anyone else's, and they're all caught in their classroom when a strange earthquake hits, splitting the floor and separating everyone... Corpse Party follows Satoshi, Naomi, Ayumi and the other students who find themselves impossibly trapped in the long-destroyed Tenjin Elementary.The originalCorpse Party was a PC-98 game made with RPG Tsukuru Dante98. It was later adapted into a PC game released in chapters, titled Corpse Party: Blood Covered, with a reworked plot and new characters. Blood Covered was later released on the PSP as Corpse Party: Blood Covered ...Repeated Fear, with new art, event CGs, and a different voice cast. This version was localized and released on the PlayStation Network by XSEED Games on November 22, 2011. A PSP sequel titled Corpse Party: Book of Shadows was released on September 1st, 2011 in Japan. This one was also released overseas by XSEED. There is Carnival Phantasm-esque entry into the series called Corpse Party 2U, released on August 2nd, 2012. A manga adaptation titled Corpse Party: Blood Covered also exists, as well as a manga adaptation of the PC-98 game entitled Corpse Party: Musume, and also one of Book of Shadows.The next planned entries into the series are Corpse Party: Blood Drive and Corpse Party 2: Dead Patient. Blood Drive will continue the story of Blood Covered and Book of Shadows, while Dead Patient will be set in a hospital and feature a new central cast, while still set in the same universe. Blood Drive is set for release in Japan on July 24, 2014. Dead Patient was initially being released episodically, but only one chapter was released, on May 29, 2013. It was later announced that Dead Patient is receiving an overhaul to its game engine; the first chapter will be redone, and all future chapters will be designed on this new engine.Do not confuse with the half-meme from Homestuck.Those trapped in Tenjin include:
Corpse Party Cemetery focuses on Naho and her paranormal investigations.
Adaptation Expansion: Corpse Party: Blood Covered significantly reworked the story from the original version, with more characters and a more complex plot.
Art-Style Dissonance: Blood Covered is played with characters looking like sprites, and the entire series is drawn as a cutesy anime. Yet despite this, this does not exempt them from grisly bloody deaths.
Yui's encounter with Yoshie ends with her losing consciousness and waking up in the school infirmary with Tsukasa at her side and the nurse still there. Whether it was All Just a Dream or Yui's memories of the incident being erased is debatable, however.
All Love Is Unrequited: Naomi covers up her crush on Satoshi by constantly teasing him, and Seiko hides her own feelings for Naomi behind a "Just Joking" Justification. And then there's Yoshiki, who has a crush on Ayumi, while Ayumi covers up her crush on Satoshi by scaring him with horror stories.
All There in the Script: Certain chapters of the manga are followed by black pages that contain information about the corpses seen in that part, giving their names and describing how they died. In the games, the player can fill a gallery of "name tags" by examining corpses to similar effect.
To put it bluntly, There were originally five characters in the PC-98 version. Everyone has the possibility of dying. However, anyone else added to the later adaptations that are trapped will die no matter what.
Big Damn Heroes: In the manga, Satoshi, Yoshiki, Naomi and Ayumi show up just in time to save Yuka from Kizami. Especially impressive in that we're initially led to think they'd walked by the Science Room without realizing Yuka was in there. Earlier, Kurosaki (who we initially think is dead when Yuka finds him) prevents Kizami from killing Yuka by revealing himself to be alive and punching him. Unfortunately, this leads to Kurosaki's real death.
It's shown that the ghosts you encounter in the game all died extremely bloody and gory deaths as children. For example all of them had their tounges cut out, one of them was decapitated, and one of their deaths was so morbid and graphic that the news article you originally read about the murders in omits it from the article.
In the first chapter you encounter blood and guts decorating a wall and the floor in the hallway. You find out in a later chapter that Mayu was killed there when she was thrown into the wall by ghosts so fast that it killed her.
After Yuka Kizami pushes his friend Kensuke Kurosaki down a pit where he falls down a floor and breaks his ribs. Yuka finds his friend and witnesses Kizami stab him several times and leave him to die in a pool of blood. Yuka eventually runs away terrified with her clothes and shoes now stained with blood from the murder
It's revealed in a flashback that Sachiko was the real murderer of the children, and she is covered in blood from killing them.
Brainwashed and Crazy. The Darknening causes this into whoever it possesses, either taking away the host's insanity completely, augmenting the darker emotions they keep inside or controlling their actions to some degree without actually taking their sanity. This is evidenced by Naomi in a Wrong End and when she kills Seiko, by Ayumi in a Wrong End where she goes full on Yandere and in the classroom Yui finds Ayumi where she tells Yoshiki to go ahead of her when she didn't mean to say that, and by Naho who was so corrupted by The Darkening that she unawarely killed Kibiki and when The Reveal causes her to Freak Out!, she releases the Darkening within her in the form of a Black Bad Barf and, as evidenced by Book Of Shadows, posted the wrong info on her blog about the charm under influence of Sachiko's curse.
Broken Pedestal: In Blood Covered, when Ayumi meets Naho again in the reference room, she confronts her about the fact that she purposefully posted the Sachiko Ever After charm incorrectly on her blog, leading to the deaths of dozens, including some of her friends and classmates, all for Kibiki's sake. When Naho seems to have no remorse for this, Ayumi tells her that she is a horrible person. Instance of the trope in that Ayumi has been idolizing Naho for the entire game up to this point.
But Thou Must: In Blood Covered, seemingly averted when you're prompted to either continue moving forward or go back at the warning of Sachiko. Played straight by the fact that even if you choose to turn back, Yoshiki will decide to go back and continue onward.
Also right after Seiko and Naomi split up in chapter 1. Seiko has the option to follow the voice or not. If you choose "no" it gives you more time to explore the area, but the only way to actually continue the game is to hit "yes".
Call Back: Yui-sensei mentions being well-versed in the ghost stories concerning the school in the intro scene. Then Book Of Shadows reveals the reason why. She lived it.
Came Back Wrong: In Book of Shadows, this is the result of Ayumi and Naomi attempting to bring back Mayu with a ritual.
The Can Kicked Him: Bathrooms are dangerous in these games. Further reinforced by Ayumi in Book Of Shadows where she explains that rooms that have any source of reflection tend to be bad news as they can be mediums for spirits to manifest.
The Corruption: The 'darkening' which corrupts the souls of those who lose hope in Tenjin. This is how Naho and her friend Sayaka died. Kokuhaku Akaboshi died similarly. It's also what makes Naomi Brainwashed and Crazy enough to murder Seiko, and what turns Ayumi into a Yandere in a Wrong End.
Death by Adaptation: Although Yoshiki, Yuka, and Satoshi all make it out alive in the "True End" of the game, they don't make it out in the Tortured Souls OVA or in Corpse Party: Musume.
Despair Event Horizon: In a very literal sense, the entire haunted school is one giant black hole made of despair, sucking in people who, when they die, become a part of the problem (usually by becoming a vengeful and/or pain-filled ghost). Most people caught in the school crack and go completely nuts if they aren't killed either by the ghosts or one another.
Doomed by Canon: Anyone who dies in Tenjin is dead, period. Even if another timeline takes place, like in Book of Shadows, they will simply end up dying in a worse way than they did previously. This happens to Seiko and Mayu.
Doomed Protagonist: This game is basically what would happen if you took a whole bunch of doomed protagonists, put them in a building together, and let nature run its course. The only characters that have a possibility of living are the original five from the PC game: Satoshi, Naomi, Ayumi, Yoshiki, and Yuka, and that's only in the True Ending.
Downer Ending: Even in the True Ending only Satoshi, Naomi, Ayumi, Yoshiki and Yuka survive. Yep, about half of the main cast consists of Doomed Protagonists and can't be saved by any means whatsoever. And don't get started with all the secondary characters that die or have died. Oh, and it's still possible for others to fuck up the ritual and get thrown into the Nightmare School Dimension even if Sachiko passes on. Not to mention that the friends they lost will not only relive their deaths in eternal suffering, but they also are completely forgotten by the world at large except their friends who survived. Quite possibly one of the harshest, most horrifying afterlives anyone could exist in, to be sure. And in the sequel... well, the protagonists only manage to mess things even more.
Tortured Souls is even worse. Only Naomi and Ayumi survive. The final scene shows that the horrors of her ordeal has turned Naomi into a broken, catatonic Empty Shell who spends the rest of her life just staring into nothing.
Dub Name Change: Not for any of the characters, but in the English release, the dreaded school is called "Heavenly Host Elementary."
Anyone who's read the New Testament will never take the name so peacefully ever again.
Early-Installment Weirdness: While the basic plot of the original PC-98 game was the same, there were originally only five students: Satoshi, Yuka, Naomi, Yoshiki, and Ayumi. The whole cast had black hair and eyes, although each had certain traits already in place (like Yoshiki's face and Ayumi's hairstyle). Instead of being separated during the transfer, they ended up all in the same place, and only wound up dividing into two groups accidentally. Satoshi's status as the Main Character made more sense, as he was leader of the main party. There were plenty of spirits, but only one major threat, a single Stringy-Haired Ghost Girl.
Everything Trying to Kill You: One of the reasons the horror and setting in the game are especially effective. There are ghosts everywhere, both core vengeful spirits and hundreds of hapless victims out to get you in hideous ways. The school itself is a Genius Loci re-arranging itself or creating traps to both directly and/or indirectly get you murdered. The Curse is always working on you and can and WILL kill you just for giving in to the despairing nature of the place and situation, or worse, causing darkening. Or making you kill yourself. The other living people there often snap and try to kill you, even before falling to the curse. And even your basic Human nature will kill you terribly without food, water, or any other amenities. And all that's if you don't kill yourself.
Eye Scream: Accidentally run into the ghost who lacks one of her eyes? Have fun watching your characters getting paralyzed and stabbed into their eye sockets with a scissor while listening to their screams. Okay, you don't actually see what is going on, but youhearit, which makes the whole incident even worse. The text describing the event doesn't help, either.
Also happens in the Tortured Souls OVA when you see how the ghost girl missing the eye was murdered, as well as to Yuka and somewhat to Yoshiki.
Fatal Flaw: Poor Naomi. Not only is she unable to confess her feelings, she tends to take out her frustration verbally on everyone around her. Even when she knows it won't help anything, she can't stop herself...
Foreshadowing: Before being torn apart, the students perform a ritual ripping a tiny paper doll into pieces; holding onto their pieces of the paper is supposed to bind them together forever. However, Ayumi teases Satoshi by claiming that bad things will happen if the ritual is performed incorrectly...
A note you find fairly early in the game establishes that good spirits glow blue, while evil spirits glow red; however, the dangerous child ghosts are blue. You find out in Chapter 2 that they're Not Evil, Just Misunderstood — the note never claimed that good spirits couldn't still be dangerous.
This case of Exact Words works both ways. There's a red spirit in Chapter 4 (in fact, the spirit of the person who wrote the note regarding spirits) that won't harm you. She's only red because she now holds a grudge against her sister.
A few dead bodies you find in Chapter 2 mutter "Ki...za...mi..." after you take their name tags. You then meet the Kizami they were talking about in Chapter 3. And then you find out why they were muttering Kizami's name.
Genius Loci: Heavenly Host Elementary is heavily implied to be this. While it started as a "mere" haunted school with Principal Yanagihori's murder of Yoshie and Sachiko, the decades of slaughter and suffering have given the school a malicious consciousness. This is further confirmed by Yuki, who mentions to the heroes that even if they managed to appease Sachiko, the school would produce another Sachiko to replace the original one so that it may continue its evil, and that all those who already died there STAY there.
Genki Girl: Seiko Shinohara. Naho's friend Sayaka as well.
The Heavy: Sachiko and Yoshie. Yoshie was the one that started the curse that would give birth to the cursed Heavenly Host, and Sachiko would become the main cog that holds the whole dimension together, and can influence the darkening in anyone within it. And should anyone come in and out of Heavenly Host while she's not appeased, she can also curse them and use them as proxies to manifest in the real world and was controlling Yoshizaku, who killed a good number of people trapped in Heavenly Host. So, any death in the series that Kizami wasn't responsible for can be traced back to them.
Heir Club for Men: Inverted with the Shinozaki family. The family head was female, and had three daughters, all of whom had daughters of their own. The family maintained its spiritual power by marrying men willing to throw away their own family names for the sake of love. All of the men died within a few years of their children being born, and all of them had daughters, with the notable exception of Ayumi and Hinoe's grandfather, who had a son (their father), but still died.
Hope Spot: When Naomi runs off to get a platform to keep Seiko from strangling to death.
In the manga, Yui is trapped under a shelf, being stabbed with the knives that were in it. A ghost offers to help her if she agrees to sacrifice her students. Instead, Yui asks him to save them rather than her. The ghost seems moved and lifts the shelf off of her. Just as Yui is breathing a sigh of relief, he drops it back on her, refusing to believe she's a good teacher. He does eventually lift it up for real, though.
Another nasty one in Book of Shadows: Naomi remembers what happens the first time during Seiko's death, and manages to save her. Seiko runs away shortly after and from the text it seems like Naomi will catch up and grab her...only for the player to hear the sound of someone falling down the stairs; and for Naomi to see Seiko lying at the bottom of a staircase, her head neatly severed from a piano wire at the bottom stair noticed earlier on.
Im a Humanitarian: One of the wrong endings were Yoshiki temporarily snaps out of his possession and finds himself dining on Shinozaki's corpse. Overcome with grief, he still continues to eat her while crying in his possessed state. When the screen fades black, the player can still hear the sounds of crunching and slurping.
In Book of Shadows Ayumi is possessed by multiple spirits. As Yoshiki tries to break her out of it, the last ghost starts talking about how wonderful it'd be to eat him and even causes Ayumi to take a bite out of his neck. Thankfully he snaps her out of it in time.
Infant Immortality: Considering that antagonists are ghosts of children and the brutal manner in which they were all murdered, it's definitely safe to say that this was averted
I Want My Beloved to Be Happy: Seiko encourages Naomi to take advantage of their circumstances to get closer to Satoshi, instead of doing the same herself.
In the original PC-98 game, you get the best ending if all five survive. If, on the other hand, your choices led to somebody's death, you get a significantly worse ending where it's made clear the others are still haunted by what happened.
Each chapter of Blood Covered has a "True End" and a few "Wrong End"s. The use of "True End" rather than "Good End" should give you a hint about the overall tone.
Murder the Hypotenuse: Appears in one Wrong End where Ayumi burns Naomi's paper scrap and renders her unable to escape Tenjin, planning to escape with Satoshi.
Subverted if you count Naomi's dream and the mails she receives near the end of the game.
Same goes for Sayaka and Naho, Morishige and Mayu...And oh god almighty Yui-sensei...
Never Split the Party: The victims were deliberately split up and cast into separate 'closed spaces' of the alternate dimension, and must first find out how to reach each other.
Never Suicide: This is played straight by Seiko, who really didn't kill herself. Averted by Sakutarou, who did.
New Transfer Student: Inverted with Mayu Suzumoto; she was transferring out of Kisaragi, and the Culture Festival was meant to be her last day there...
Nice Job Breaking It, Hero: Naomi and Seiko were lucky enough to end up together when everyone was separated; however, Naomi takes out her frustration on Seiko, accusing her of not taking matters seriously, driving her away. This doesn't end well.
According to Naho, the reason they got trapped within Heavenly Host in the first place is due to this: someone messed up during the paper doll ritual. Later, it's discovered that wasn't the case; she posted the wrong instructions on her blog.
Nightmare Face: Not only do many of the evil spirits sport these, the victims' reaction faces veer into this territory, especially in the manga.
Nightmare Fetishist: Subverted with Ayumi. She delights in telling scary stories, but once she finds herself in one, she is very freaked out. Sakutarou plays it straight, though.
Sakutarou was pretty creepy for this in Blood Covered, but goes further than ever in Book of Shadows when he describes the act of chasing Yuka around as 'nearly orgasmic'.
No Canon for the Wicked: Averted; several of Book of Shadows's chapters follow a Bad Ending where Satoshi finds himself in a "Groundhog Day" Loop and can't prevent the others from performing the ritual and returning to Tenjin. Another chapter expands upon a path where Kizami caught Yuka — and some of Sachiko's dialogue hints it may simultaneously follow from the former Bad Ending. The only chapter that follows Blood Covered's True Ending must be unlocked, and basically sets up the next game, Blood Drive.
No Dub for You: The U.S. PSP release keeps the original Japanese voice acting, with no option for English voices.
No Periods, Period: Ayumi gets her period without realizing it (you begin seeing a blood stain on the back of her skirt partway through the game). She's very embarrassed when Yoshiki notices and asks when she got hurt, but she can't think of any way to change or cover it up. No one else comments on it though (either they think it's from one of the numerous dead bodies, or they just have bigger problems).
Nothing Is Scarier: Frequently combined with a form of Gory Discretion Shot: instead of fully illustrating whatever horror the characters are enduring, you instead have to hear it. Book of Shadows uses this even more extensively.
On a less significant note, the nametags you find include another Shinohara, as well as a Yuuya, a Satoshi, and a Seiko
Panty Shot: Mayu. In one scene, two ghost children grab her feet and lift her up in the air, causing her skirt to fall down over her hips and exposing her striped blue and white panties. The children spread Mayu's legs apart wide, pulling the cloth of her panties tightly over her genitals and showing the shape of her labia on the fabric. She needn't have worried about exposing herself though, as the children then brutally kill her shortly after.
Pocket Protector: Can appear in Chapter 4 of Blood Covered, deflecting a pair of scissors. Sadly, Seiko's cell gets destroyed in the process, leading to a Wrong End.
The Power of Friendship: It's established very quickly that the only way to have even a chance of surviving Tenjin is to have reliable friends and companions with you — if you get separated from them death, possession, or insanity borders on instantaneous. Also referenced in one of the Chapter 5 name tags, where it failed to save its believer.
Promotion to Parent: After losing her mother, Seiko has become a sort of surrogate mother to her younger siblings.
Public Domain Soundtrack: Moreshige's theme of love in Book of Shadows is a slightly lower pitched version of Pachelbel's Canon in D Major.
Red Herring: Double Subversion with the health points in the PSP version. Most deaths are a Non-Standard Game Over, so it doesn't matter how many HP your characters have. There are some instances where the floor reduces your HP if you walk over it, but since you find a measure to become resistant against it, HP doesn't have much meaning here either. And unlike in the Pc-98 version, there is no Final Boss Battle.
There's another, more story-related red herring example. If you really look at it, in the original storyline, trying to tell who exactly the bad guy is is rather complex. Is it the children? No. Is it the mentally-challenged man who killed them? No, and he wasn't even the true villain! Was it the real killer, Sachiko, for whom the curse is named? Sort of. Is it her mother? Sort of, but no. Is it the Principal? Sort of, but no! The truly evil entity (read: Not crazy) may very well be Heavenly Host Elementary School itself, as even when Sachiko, whom was supposedly the keystone in causing all of this, is gone, the school just makes another one and then seals itself away even tighter so that it's even less possible to escape than it was before! Oh, and it doesn't end there either. This whole ordeal, at least for all of the recently-killed students, was caused by Naho in an attempt to please Kibiki by providing him with more 'samples' of sorts for his investigation by purposely posting the WRONG version of the Sachiko Ever After ritual on her paranormal blog, and so everyone (normally high or middle schoolers) who tries it appears in the Closed Spaces. It would've ended when the original school was demolished had it not been for her. Although Book of Shadows has heavy evidence that Naho was being controlled by Sachiko when that happened.
Ret Gone: In Blood Covered and Book of Shadows, this is the fate of the classmates killed in Tenjin. Only the survivors remember them; for everyone else, it's like they never existed in the first place.
Retirony: If Mayu had only transferred out sooner...
Invoked as Easter Egg: In Chapter 4, when regaining control of Satoshi and Naomi, you find Seiko's mobile phone in front of the janitor's room. Instead of picking it up right away, return to the toilet where Seiko died to see a small event. After that, pick it up and go to the school infirmary to trigger a dream sequence where Naomi will rest on the bed. Seiko appears in her dream and tells her that she's sorry about their fight and wants to make up for it before she finally leaves this world. You then have the option to let Naomi grant Seiko her final wish: A kiss. The whole doubles as Crowning Moment of Heartwarming and Tear Jerker.
Schmuck Bait: So damn many. Hm, let's rest in the infirmary-OH DEAR GOD *consumed by ghost*; Hmm, the fifth and final Victim's Memoir-*SPLAT*; Hey, that anatomy model is kinda creepy-OHSHI- *Mauled to death*
There's also a case where you must take one of those deliberatery to proceed. More specifically, the one in the room with the message from the dead that tells you not to read a newspaper. If you don't, you get a Wrong End. If you do, you proceed and can go to the next chapter. This is the one time this must be done.
First, if Yoshiki sacrifices himself to draw the anatomical model away from Ayumi, and they're the only casualty, then during the ending Ayumi gets choked to death by a vengeful spirit. Assuming, of course, she isn't hallunciating the whole thing and clawing her own throat out.
Secondly, if Naomi saves Yuka from the stall, this leads to her Demonic Possession, where she ultimately kills Yuka with her own hands.
Sequel Hook: The final chapter of Book of Shadows provides a big set-up for a sequel, including a 'Continue to the next game' note right before the credits.
Slasher Smile: Several. Most notable ones being the shadowy creature faced at the end of chapter one, possessed Ayumi, and Sachiko. Oh sweet lord, Sachiko.
The first example of such is a real Player Punch: If the player heeds the dying words of a previous victim — found in a room you're warned it's a bad idea to even enter, at that — and does not read the newspaper clipping in chapter 1, not only does Seiko dies hung by her neck, Naomi herself is possessed and commits influenced suicide by swallowing a pair of scissors. What a way to shake up the player's expectations.
Symbolic Mutilation: A cross between this and Does This Remind You of Anything? - The first ritual has the students rip a proxy doll apart, which is supposed to correspond to Sachiko, as the ritual carries her name. The correct ritual has the survivors unite said paper doll, begging her (for her forgiveness) so as to appease her wrath in order for her to pass on at last.
Tempting Fate: Ayumi survives the ordeal, which she created with the whole Sachiko Ever After charm, and THEN she decides to investigate her bloodline in what is clearly an ill-conceived attempt to undo all the damage she caused. She picks up an eerie-looking book called THE BOOK OF SHADOWS, inside what appears to be a smaller version of the Heavenly Host Elementary School (since the property appears and disappears at will and is actively distorting the nearby region) but still decides to attempt a resurrection spell after casually believing in the "out of sight, out of mind" motto. Honestly, that girl is a Disaster Magnet mixed with Dumb Chick in a Nightmare Fuel world.
There Is Another: The students of 2-9 aren't the only ones currently wandering through Tenjin...
Naomi: How is this possible...? We're not in a video game or a manga...
Title Drop: In the Book of Shadows chapter "Shangri-La", Morishige gleefully describes Tenjin as a "Corpse Party" as well as calling it "Shangri-La".note "Shangri-La" is also the title of Blood Covered: Repeated Fear's opening theme, making it another reference.
Trauma Conga Line: Ayumi faces a painful one. In Book Of Shadows, she is trapped in Heavenly Host, seen a good deal of people dying in horrible ways, nearly died herself, tried to revive her killed friend only to have it backfire horribly on her and ends cursed as a result. It seems like all is gonna be fine when Hinoe comes and saves her...only Hinoe gets beheaded when she is comfort hugging Ayumi.
Twisted Ankle: Naomi's ankle gets twisted after a bad landing, making it difficult for her to get around at first.
Unlucky Childhood Friend: Satoshi and Naomi have known each other since seventh grade. He isn't aware that she's interested in him, though, since she constantly teases and provokes him. Satoshi does have a Love Epiphany with regards to her, though. It's in one of two non-True endings in the game that's not counted as a Wrong End, and Naomi and Yuka die as a direct result of the choice that leads to this.
Unusually Uninteresting Sight: In Book of Shadows, Naomi doesn't give any reaction to room 1-C being filled with green, glowing words like "It hurts" "Die" "Just Die" "No hope of rescue" "Spill your blood" and others on the floor and walls. She also doesn't seem to care that a creepy face from the green is covering a child's drawing. Then again, she's only seeing this because her in-game darkening meter is high enough to hit the Despair Event Horizon...
Wham Episode: Each chapter will end this way, shoving a shocking event in your face that changes how you look at the situation.
Chapter 1: Naomi finds Seiko hanging in a bathroom stall and is unable to save her. Seiko's death is the first to establish that no one is safe
Chapter 2: Ayumi and Yoshiki are unable to save Mayu from Yuki and Tokiko, as she gets splattered on a wall like a tomato. Ayumi then runs off traumatized. While Yoshiki shouts for Ayumi to stop, he is hit from behind by Yoshikazu with a large mallet. He gets better though.
Chapter 3: Satoshi is separated from Yuka and Naho appears to tell him that they were brought to Heavenly Host because they did the charm wrong.
Chapter 4: Ayumi and Yoshiki get Yuki's tongue back, and are teleported back to the classroom. Yuki then appears and Ayumi asks Yuki to show her what really happened on the day of her murder. Through an Exposition Beam, we learn through Yuki's eyes that she was actually murdered by Sachiko(the fourth supposed surviving child), and not Yoshikazu (the supposed killer). All while Sachiko stabs out Yuki's eye.
Chapter 5: Satoshi, Naomi, Yoshiki, Yuka, and Ayumi escape, but they later learn the next day that those who died had their existences erased and that the five are the only ones who remember them.
The Final Chapter of Book Of Shadows, Blood Drive, also counts. Ayumi and Naomi travel to the Shinozaki estate to investigate what happened to them. While there, they discover evidence that suggests Sachiko's mother, Yoshie, had been investigating the Sachiko-Ever-After charm before she'd died. Ayumi and Naomi uncover the titular book and try to use a spell to bring Mayu back to life. It sort of succeeds. When Ayumi and Naomi are in danger of dying when their paper dolls catch fire, Ayumi's sister Hinoe comes right out of nowhere and saves them. Right when she's comforting Ayumi, however, her head comes off right in front of Ayumi.
What the Hell, Hero?: When Ayumi and Yoshiki are returned to the classroom by Yuki Kanno, Ayumi asks to return to save the others. In a certain Wrong End, Yoshiki protests this. Ayumi calls him out, saying that he doesn't care whether their friends die. Yoshiki in turn calls her out, accusing her of only caring about Satoshi. It ends with a love confession on Yoshiki's part.
In Blood Drive, Ayumi catches this again, this time from the spirits of the dead Seiko, Mayu, Morishige, and Yui. They point out that despite her good intentions, her efforts to revive them are not only failing miserably, but are getting even more people killed.
Yank the Dog's Chain: In Book of Shadows, Naomi tries to Screw Destiny, but learns that not only is Seiko marked for death, but each new demise will be worse than the last.
You Can't Fight Fate: In Book of Shadows, it's claimed that anyone who previously died in Tenjin cannot be saved, no matter what. Not only that, but their new deaths will be worse than the first...
There is, however, evidence that Sachiko is lying — that she's the one enforcing that rule, and can suspend it when it suits her. She all but directly states something to this effect in "Mire"'s True Ending, and it's subtly implied that "Shangri-La" takes place in the 'World Loop' universe and Sachiko is intentionally letting Morishige live because he amuses her.