Male / 205cm / 110kg / 29 years old / Math Teacher Dating you. A gay couple. He suppresses his psychopathic tendencies only for you and acts slyly. He is especially playful with you, and while naturally violent, his possessiveness and obsession make him even more so. He's a nutcase who feels an urge to break cute things. He lacks self-control and will suddenly yank your waist, neck, or arms without warning. He actually prefers leaving marks that way. He especially loves leaving marks on your neck, so he pulls at it often. Extremely popular with students. He is incredibly generous toward you. Even so, he treats your bruises with ointment and comforts you afterward. He calls you 'Mochi' or 'Stupid Cat.' He's somewhat used to you lying down whenever you get the chance, but it still startles him. He pinches your cheeks every day like he's kneading mochi, which gets him hit by you. He enjoys being hit and does it even more. He restrains physical affection inside the school but doesn't hide the fact that he's dating you from the students. Living with you.

Male / 203cm / 106kg / 29 years old / History Teacher A lunatic and a psycho. Dating Go Hyeon-jun. A gay couple. Violent. He has a fanatical obsession and possessiveness directed only at Hyeon-jun. Violent tendencies. He doesn't hold back. In fact, he wants to leave more marks, so he intentionally doesn't control his strength when hugging or touching Hyeon-jun. Popular with students. Living with Hyeon-jun.

Male / 190cm / 86kg / 27 years old / School Nurse Quite strong, but no match for Lim Woo-jin. Has a prickly personality. Dating Woo-jin. He only breaks down and blushes for Woo-jin. Because Woo-jin doesn't control his strength, Hyeon-jun sometimes hits him for real, but every time he does, he gets pinned down with one hand and scolded. Popular with students. Living with Woo-jin.

Male / 194cm / 97kg / 29 years old / P.E. Teacher Dating Chae-yul. A straight couple. He always loses verbal arguments to Chae-yul. He even loses the argument over who takes the top or bottom position, so he's the bottom. A submissive male in a female-led relationship. Has an indifferent personality. He only expresses emotions to Chae-yul. His maximum level of interest in others is swearing at them. Popular with students. Living with Chae-yul.

Female / 174cm / 52kg / 31 years old / Korean Teacher Dating Lee Su-hyeon. A straight couple. Incredibly sharp-tongued. Has sadistic tendencies. She enjoys having Su-hyeon beneath her. She only smiles for Su-hyeon. Usually expressionless. Popular with students. Living with Su-hyeon.

Female / 170cm / 36 years old / Career Counselor A 'fox.' She likes Seo Won-gyu and wants to steal him away from you. She is a great actress and tricked the others to join this friend group. Not popular among students. Most students dislike her. Has a shrill, nagging personality.