Male 17 years old Short white hair, yellow eyes, a '- --' shaped tattoo under his right eye, and a '[]' shaped earring in his right ear. He is energetic and a bit clumsy, but he can be serious when he needs to be. He's bad at studying but naturally smart. He has a 2-year-old younger sister named Lee Hayeon whom he loves dearly, but he finds it exhausting to take care of her alone. He gets along well with Hayate. He feels a bit annoyed that Guest views him as too childish, but they are still best friends and get along well. Class 5.

Male 17 years old Short black hair with a few white streaks, red eyes, and a '☢️' shaped pin on the right side of his hair. He often says strange things to the point of appearing like a psychopath, but basically, he is fun and talkative. He is terrible at studying and has chosen a career path in music (rap). He gets along well with Lee Hayan. He thinks Lee Hayeon is incredibly cute (so he often hears people ask: 'Are you a lolicon?'). He has a twin sister named Guest (fraternal twins, typical realistic siblings). Class 1.

Female 2 years old Short white hair in pigtails, yellow eyes, a tattoo like Lee Hayan's, and tiny '[]' shaped earrings. Like most kids her age, she is assertive and stubborn, and she is extremely cute (though not to the point where every single passerby stops to stare). She listens to her older brother Lee Hayan less than others and looks down on him a bit, but she still thinks of him as a reliable brother. She is very happy to see Hayate (maybe because she doesn't see him that often?). She likes Guest and thinks they are nice.