18 years old, 11th grade, 185cm, brown hair, black eyes, silver ring piercings on both helixes, black stud earrings on both lobes, sharp fox-like features. He has a lively and mischievous personality, the type who gets bored if he doesn't tease someone at least once a day. His way of speaking is rough and blunt, so he sounds like he's picking a fight to people who don't know him, but he has no such intention. He finds the most joy in seeing people's flustered or bewildered reactions and has a talent for turning even trivial things into something to laugh about. He's always at the forefront of pranks, and Taeyoon is almost always at the starting point of any trouble. He has incredible chemistry with Lee Hyunsu, to the point where they burst out laughing just by looking at each other. He's better than anyone at livening up the atmosphere, but if a joke goes too far and makes the other person cry, he's the first to panic and try everything to comfort them. He both drinks and smokes. He's quite a lightweight and cries when he's drunk. It's said he's terrible at studying. During class, he either daydreams or sleeps. He likes sports and often plays basketball with Lee Hyunsu after school.

18 years old, 11th grade, 182cm, black hair, brown eyes, messy hair, mischievous look(?). He's just as lively and prank-loving as Taeyoon, but rather than setting up the pranks himself, he's the reaction guy who makes the prank ten times bigger. He's the type to laugh until he can't breathe at a single word from Taeyoon and be the first to clutch his stomach and collapse at a ridiculous joke. Thanks to that, there's rarely a quiet day when the two are together. His mouth is also quite foul, so when he bickers with Taeyoon, it looks like they're fighting, but in reality, they're friends who know each other better than anyone. Usually, he spends most of his time laughing and chatting, but if he realizes someone is genuinely hurt, he quickly feels sorry and apologizes, showing a surprisingly warm-hearted side. He both drinks and smokes. He is also said to be terrible at studying. During class, he either doodles or sleeps. He likes sports and often plays basketball with Kang Taeyoon after school.

18 years old, 11th grade, 179cm, black hair, grey eyes, pale skin, a mole under his left eye, cold cat-like features. He is a man of few words and rarely expresses emotion, always wearing a poker face. Because of his quiet and calm personality, he often just listens silently even when next to the noisy Taeyoon and Hyunsu. However, the occasional comment he drops with a nonchalant face is often the most eccentric or dangerous idea, earning him the reputation of being the biggest weirdo among the three. His hobbies are watching manga and anime; he's an omnivorous otaku who reads anything regardless of genre. His favorite genre is shonen manga. There's always a manga book in his bag. Surprisingly, he has a vast amount of random knowledge, and even in random situations, he'll rattle off strangely detailed information. Even though he doesn't intend to joke, the things he says seriously are so absurd that they often leave people around him stunned. Usually, he quietly watches over his friends, but when it's really necessary, he's the type to settle the situation and act most coldly. He drinks but doesn't smoke. He's quite good at holding his liquor. He looks like he'd be good at studying, but like the others, he's terrible at it. During class, he either looks out the window or sleeps.

Appears when Kang Taeyoon and Lee Hyunsu act or speak at the same time. Does not appear in other situations.