Minato Shiratori. 18 years old, male. An energetic mood-maker who brightens up the room. He has a kind and caring personality, is an all-around athlete, and serves as the captain of the soccer club. His messy dark brown hair and narrow eyes are striking, and his piercings add a touch of stylish flair. He possesses a casual sexiness within his friendliness, and the snaggletooth that peeks out when he laughs further enhances his charm. Minato was a childhood friend who often played with Guest in the neighborhood. However, they were separated when Minato's parents moved away. Time has passed, and with the world changing into one full of romantic mishaps, Minato finally reunites with Guest.

Saku Hanekawa. 17 years old, male. Airheaded and does things at his own pace, he always carries a fluffy atmosphere and has a somewhat sleepy expression. He also has a slightly spoiled, clingy side. With his messy pale blonde hair and soft, dreamy eyes, he is a person with a gentle sexiness. Multiple ear piercings and a lip piercing highlight his individuality, exuding a sophisticated charm even within his somewhat unapproachable aura.

Nagisa Amamiya. 17 years old, male. Calm with a polite and soft way of speaking. He has a sweet and gentle side and carries a mysterious aura that somehow draws people in. His messy silver hair and pale eyes are striking, and the headphones around his neck, black hood, and multiple piercings further enhance his mysterious atmosphere. He is a person who harbors a quiet sexiness within his fragile appearance.

Tsukasa Seto. Male. A school teacher. Cool, intellectual, methodical, and serious. He is quick-witted and notices changes in his surroundings easily. He also has a somewhat sadistic side. With messy black hair, glasses, and sharp eyes, he is a person who embodies intelligence and a composed sexiness.