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An Axe To Grind is no longer a trope


* AnAxeToGrind: He tries to kill Dong-sik with an axe.
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* ChairmanOfTheBrawl: He briefly uses a chair as a weapon against In-woo.
* ClotheslineStealing: After escaping from prison he has to get rid of his prison uniform, so he steals clothes from the nearest clothesline.
* CuteAndPsycho: Subverted. He's very cute and not at all psycho, but he ''thinks'' he's a psycho.
* DisguisedInDrag: He dresses as a woman after escaping prison.
* EasyAmnesia: Gets amnesia from being hit by a car then knocking his head on a fire hydrant.
* ExtremeDoormat: Starts out as one. He stops being one once he becomes convinced he's a psychopath.
* TheGlomp: Glomps In-woo to distract him while he [[PoisonedChaliceSwitcheroo switches their drinks]].
* InterruptedSuicide: A variant. He plans to commit suicide but is too scared to do it. So when he sees a car arrive at the building he uses the possibility of being caught to convince himself to go home.
* ManBitesMan: He bites In-woo's leg during their fight in the escape room.
* MissingMum: Lost his mother years before the series starts.
* MistakenForGay: One of In-woo's "friends" assumes he's In-woo's lover.
* MistakenForMurderer: Played with, since in this case a character mistakes ''himself'' for a murderer. Thanks to In-woo's diary and a case of amnesia Dong-sik becomes convinced he's a serial killer.
* TheScapegoat: In-woo sets him up to take the blame for his murders.
* SpannerInTheWorks: He constantly ruins In-woo's plans just by existing.
* TookALevelInBadass: At the start of the series Dong-sik is an ExtremeDoormat. By the end he's outwitted In-woo repeatedly.


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* MistakenForCrazy: Her InnerMonologue takes the form of her father showing up in strange places. Sometimes she responds to him out loud. Everyone else is very confused to see her apparently having a conversation with herself.


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* AnAxeToGrind: He tries to kill Dong-sik with an axe.
* AxeCrazy: As a child he was willing to murder his half-brother. He just gets worse from then on.
* BitchInSheepsClothing: A male example. He pretends to be kind and friendly to hide his true nature. Best shown when Dong-sik phones him and In-woo pretends to be sympathetic while laughing at Dong-sik.
* DestinationDefenestration [=/=] DisneyVillainDeath: [[spoiler: He accidentally defenestrates himself when his fight with Dong-sik leads to him crashing into an already-cracked window. He survives thanks to a passing garbage truck.]]
* EvilGloating: Indulges in this when he taunts the nearly-comatose Detective Shim.
* FaceOfAnAngelMindOfADemon: He doesn't look dangerous and -- when other people are around -- he acts normal. He's also a psychopath who enjoys killing people.
* LaserGuidedKarma: Gets hit with it twice.
** He tries to kill Dong-sik and Bo-kyung, leading to Bo-kyung trying to shoot him and hitting the window instead. [[spoiler: Then In-woo crashes into the window, falls through it, and ends up in a vegetative state.]]
** When he wakes up he tries to kill Dong-sik again. [[spoiler: He walks right into the trap Dong-sik and Bo-kyung set for him, gets arrested, and ends up in prison.]]
* LaughingMad [=/=] PsychoticSmirk: Has a very unhinged half-laugh half-grin that he uses when planning to kill someone.
* MissingMum: Lost his mother years before the series starts.
* MistakenForGay: One of his "friends" assumes Dong-sik is his lover.
* MuggingTheMonster:
** Sung-cheol threatens In-woo with a knife and tells him to drive where Sung-cheol tells him to. In-woo goes along with it... for a while.
** Mu-seok attempts to blackmail In-woo with photographs of a murder he committed. In-woo hides in Mu-seok's car, knocks him out, and kidnaps him.
* NeverSuicide: His modus operandi is to make his murders look like suicide.
* {{Patricide}}: [[spoiler: He shoots his father.]]
* SerialKiller: He kills at least eight people before and during the series.
* SharpDressedMan: Is rarely seen wearing anything but a suit, even when threatening and killing people.
* SiblingMurder: Attempts this by proxy when he tries to make Dong-sik murder Ji-hoon. [[spoiler: He fails because Dong-shik only pretends to kill Ji-hoon.]]
* SiblingRivalry: With Ji-hoon. It goes all the way back to their childhood, as shown in the flashback where In-woo tries to smother Ji-hoon.
* SlasherSmile: Has a truly terrifying grin.
* TroublingUnchildlikeBehavior: As a child he planned to kill Ji-hoon because Ji-hoon had taken In-woo's room.
* VillainousCrush: Possibly has one on either (or both) Dong-sik or Bo-kyung. He's very interested in Dong-sik, and he strokes Bo-kyung's face while saying he has feelings for her. But then he's also willing to kill both of them, so it's up for debate if he's sincere.
* YouHaveGotToBeKiddingMe: His reaction to Dong-sik spectacularly failing to kill Mu-seok.
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[[foldercontrol]]

!!Main Characters

[[folder: Yook Dong-sik]]
--> '''Played by:''' Yoon Shi-yoon
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/dongsik.jpeg]]

A clerk at Daehan Securities. Accidentally finds In-woo's diary and thanks to LaserGuidedAmnesia assumes he's the diary's owner.
[[/folder]]

[[folder: Shim Bo-kyung]]
--> '''Played by:''' Jung In-sun
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/bokyung.jpg]]

A policewoman who befriends Dong-sik.
[[/folder]]

[[folder: Seo In-woo]]
--> '''Played by:''' Park Sung-hoon
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/inwoo.jpg]]

Director of Daehan Securities. The real serial killer and the owner of the diary Dong-sik found.
[[/folder]]
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