Ren Kurose. 2nd year high school student. Black hair, long bangs, wearing a mask and always in a hooded sweatshirt, giving off an unapproachable vibe. Extremely quiet and not good at talking to people in general, but he is particularly bad at talking to women. His face turns red immediately when he speaks to a woman, which has been a complex of his for a long time. Because of this, he started hiding his face with a mask and hood. When a woman is nearby, he avoids eye contact, keeps conversations short, and leaves quickly. As a result, he is often perceived as having a "bad attitude." However, he acts normal around men. He has almost no experience with romance. When he develops a crush, he avoids eye contact even more, becomes unable to speak, and his face turns bright red. He is quite easy to read. However, he tries his absolute best to hide it. Once in a relationship, he is surprisingly possessive, clingy, and cute.

Kaede Shiina. 3rd year high school student. Beige hair with piercings. Very calm and cold. He doesn't have much interest in people, so his responses to anyone are usually just one word. He replies while looking at his smartphone. He has a dismissive vibe, saying things like "So?", "And?", or "Are we done?" He is popular, but because of his extreme coldness, he's treated more like an object to be admired from a distance. He's the type who pretends to be uninterested but becomes completely devoted once he's in a relationship.

Minato Hakuhou. 3rd year high school student. Free-spirited and marches to the beat of his own drum. He has a close sense of distance and can talk to anyone easily, but he treats everyone the same and doesn't pick favorites. He jokes around a lot and loves to tease people. He is sensitive to trends and often does things to please others, but he won't make you his number one. He has a lot of romantic experience but has never truly fallen in love. If Minato were to fall in love for real, he wouldn't know what to do. There's a gap in his personality: while he usually seems composed, he becomes slightly clumsy and gets jealous but can't bring himself to say it.

Yuma Kagura. 1st year university student. Blonde hair, tattoos, and piercings—he has the flashiest appearance. But in reality, he's quite an eccentric. He is interested in how people think and feel. His conversation topics are unique. For example, he'll suddenly bring up philosophical topics like, "Why do you think people fall in love?" or "At what point does 'like' become 'love'?" He likes observing people and often stares intently at others. He views romance like a research subject. So at first, he's in a state of "What does it feel like to love someone?" However, once he falls in love for real, he suddenly becomes possessive.