All Just a Dream: Subverted. The first morning Marin wakes up at Planets, she’s convinced that all the strange things happening to her were just part of a dream. That is, until her new roommate chucks a pillow at her.
Armor-Piercing Question: More of a statement. Marin tells Kaius that she’s beginning to buy into the rumors that he doesn’t have a soul because he’s so uncaring and closed off. Rather than his usual snark, he flinches, followed by a brief silence.
Be Careful What You Wish For: On first arriving at Planets, Marin so desperately wishes her telepathy would go away that she beats her head against a wall trying to give herself another concussion. When her psych does go away, she has to leave Planets as there's no longer any reason for her to be enrolled there.
Ryuu: I want to be with you forever. Even if forever for me isn't that long.
Bridal Carry: Kaius carries Marin to the infirmary this way when she runs into him, falls, and skins her knee.
Brought Down to Normal: Marin mysteriously loses her telepathy some time after she transfers to Planets, forcing her to transfer back to her old school.
The Cloudcuckoolander Was Right: Ruiko, the space case gullible enough to be convinced that a school day is actually Sunday and she can go back to bed, is the only person to recognize on first sight that Haruhi is a boy.
Crash into Hello: Marin and Lucan literally bump into each other when heading for the same dinner table.
Digging Yourself Deeper: Marin and Lucan hide in a small janitor’s closet after running away from his fangirls. While pressed up against each other, Lucan’s comments get progressively more awkward as he tries to correct himself.
Marin: Hopefully, this is a good situation compared to being trampled.
Lucan: Ah, well, that’s not to say I mind being in here with you, Kazuoki-san, but—Ahh, what did I just say?! I didn’t mean that in a perverted way, really! I just meant, I’d rather be here with you, than out there, but more than anything, I’d rather be neither place…That sounded rude, didn’t it?! Honestly, Kazuoki-san, being here with you isn’t bad at all! Really, I-I-I’m enjoying it!
Fun with Acronyms: “Planets” stands for the Psychokinesis Learning Academy for New and Exciting Tactical Studies.
Girl in a Box: Male version. Once summer vacation is over and Marin heads back to Planets, she opens her luggage to find Haruhi inside.
The Glomp: Ryuu tackles Marin and teleports her to the creek near his home for an unofficial picnic date. Haruhi’s also fond of this. Surprisingly, once Marin gets Kaius to open up, he greets her in this way as well.
Gym Class Hell: Marin’s first day in gym at Planets is spent playing baseball against a rival class; however, the catch is that everyone uses their psych to cheat and no one but Marin cares about playing fair.
Headdesk: Marin indulges in this with a brick wall... and ends up bleeding.
Hidden Depths: All of Marin's main love interests turn out to be More than Meets the Eye in some way. It's the most obvious with Kaius, a Jerkass loner who naturally turns out to have a heart of gold and a love of cats to boot, but more surprising is Ryuu, a playful and carefree delinquent who turns out to be a Stepford Smiler suffering from a heart condition that could potentially end his life at any moment and Lucan, a popular and perfect gentleman who turns out to be so deeply insecure and lonely that he used his Mind Control psych to become popular and loved by everyone and does some very dark actions if Marin turns her back on him.
Indirect Kiss: Referenced by name. Marin shares her leftover sandwich with Ryuu, who teases her about sharing an Indirect Kiss with him. Marin also teases Kaius about sharing an Indirect Kiss with her when he steals one of her half bitten rice balls, but he dismisses it as “elementary school bullshit.”
Just Friends: Ruiko thinks Haruhi is Marin’s boyfriend when she sees him in their room. Marin says they’re “just friends.”
Just in Time: During Ryuu’s fight with Kaius on the roof, Marin tackles Kaius to try and knock him down. Unfortunately, this works too well, and Marin manages to knock both her and Kaius off the roof. Ryuu teleports and grabs them just when they’re a few inches from impact.
Lame Excuse: Kaius tells Marin that he has something to do to avoid eating lunch with her. But when she later asks him for homework help, he rescinds his excuse.
Leaning on the Fourth Wall: After angering Kaius, Marin mentions that she “probably got minus ten points on his scale of how much he likes [her].” Keep in mind that she’s in an Otome Game, where relationship values for a guy typically increase or decrease on a scale due to a single action.
Memento MacGuffin: Kuma-chan. It’s special to Marin because it’s a reminder of the close friendship between her and Haruhi.
A Mind Is a Terrible Thing to Read: When Marin is first able to read minds, she finds out that her dad thinks she’s a wiseass and dislikes having to look after her, and her mom finds her annoying and regrets having a child.
Mind Control: Lucan does this to quite a few people. It’s the reason why he has so many fangirls despite his shy personality. He also brainwashed his irresponsible parents to make sure they cared for his sisters when he left to attend Planets.
Mind Rape: It’s suggested that since it’s possible for Marin to lose her Psychic Powers, she may have her memories of her time at Planets erased.
As well as what Lucan does to Marin if she rejects him during his route.
Missing Mom: Where’s Kaius’s mother? He accidentally disintegrated her with his psych when he was a boy who could not control his emotion-based powers.
Not What It Looks Like: Marin and Lucan are hiding from his fangirls in a small, dark closet. When Lucan loses his footing, they both fall to the floor. When Lucan’s fangirls finally find them and open the door, Marin realizes that she fell on top of Lucan, and says it’s all a misunderstanding.
Odd Couple: Lucan and Ryuu are roommates and best friends, but they’re completely different. While Lucan is a good student with a somewhat bashful and subdued personality, Ryuu is a slacker with an energetic and overly friendly personality.
Parental Abandonment: After Marin arrives home for summer vacation, she learns that Haruhi has moved into her house because his parents disowned him.
Peek-a-Bangs: Kaius, emo variant. One of the rumors about him is that the hidden eye is an Magical Eye; like all the other rumors, this is untrue (or at least nothing unusual about it is ever revealed).
Person of Mass Destruction: Kaius is implied to be one, judging from the destroyed area of the forest and the fact he vaporized his mother.
Power Incontinence: This is Marin's main problem with her telepathy. Kaius also loses control of his psych if he gets too angry.
Ironically, it turns out that Lucan ended up with one mainly because he wanted one so desperately when he first came to Planets that his secret Mind Control psych unconsciously kicked in and made that wish reality for him.
Visible Silence: When Marin catches up with Kaius on the way to her room for her first day at Planets, there’s a long, visible uncomfortable silence the equivalent of six back-and-forth dialogue boxes between the two.