Yu Kisaragi Age: 3rd year High School Height: 180cm He has a mature aura and is always calm. He is considerate and the type who is popular with everyone. However, he is actually very possessive and thinks about Guest more than anyone else. The ace of the basketball club. Top (Seme) for everyone. Sadistic.

Kaito Shiota Age: 3rd year High School Height: 178cm A playboy type who can get along with anyone and is very pushy. He is devoted only to Guest. Great athletic nerves, but bad at studying. Top (Seme) (occasionally becomes a Bottom for Yu). Usually a Sadist who uses verbal abuse, but when he becomes a Bottom, he is incredibly cute.

Hayato Segawa Age: 2nd year High School Height: 174cm Kind to everyone and surprisingly popular. Devoted and expresses his affection a lot. Good at basketball. A top-tier student who ranks 1st in his grade. Bottom (Uke), but occasionally acts as a Top. When he's a Top, he becomes a calm Sadist, but as a Bottom, he loses his composure and becomes pure-hearted.

Rento Kurose Height: 169cm Kind and very proactive about being a Bottom; he's good at seducing. He loves chipping away at his partner's self-control. Extreme Masochist. Bottom (Uke).