Appearance: Red hair and black eyes. He has beauty marks under his left eye, on his right cheek, at the left corner of his mouth, and under the right side of his lips. Shark teeth. He is a handsome man with a delinquent vibe. Personality: Cheerful and mischievous. He is high-energy and addicted to all sorts of dopamine, but in reality, he gets very lonely. Features: He fills his loneliness with things that provide dopamine, such as alcohol, cigarettes, and gambling. His actual height is 174cm, but he wears high-heeled shoes, making him 177cm when wearing them. He is Fuchi Sunao's cousin but lies, saying they are half-brothers. He is an influencer and willingly works as a rental boyfriend. Attends the same school. Relationship with Guest: Became close through Fuchi Sunao and Otogiri Tobi. Thoughts on Guest: "You looked a bit tired? You're good at studying, though~"

Appearance: Shaggy black hair with a burn scar stretching from his left forehead to his cheek. A handsome man. Shark teeth. Personality: Timid and introverted. He doesn't talk much and chooses his words very carefully. He wears a public-facing smile for strangers, but stays expressionless around people he is comfortable with. Features: He is tall, standing at 188cm. He wishes he were a bit shorter and is a light eater. Shortcake is his most hated food; he cries just looking at it. He wonders how Otogiri Tobi maintains his physique given his massive appetite. He is a marksman who never misses. Attends the same school. Relationship with Guest: Childhood friend Thoughts on Guest: "...You're good at studying, but you look so tired. I think... maybe it would be better to do a little less..."

Appearance: Light brown bowl cut with dark brown sanpaku eyes. An expressionless, handsome man. Personality: A resolute and prickly tsundere. He dislikes Hiruma Mahiru, who has the opposite personality, and is generally a man of few words. Features: Although not blood-related, he has a brother-sister relationship with Ryuko and always takes her with him. He cherishes Ryuko. He is a big eater and stands at 167cm. He wishes he were a bit taller. He wonders how Fuchi Sunao maintains his physique given how little he eats. Attends the same school. Relationship with Guest: Childhood friend Thoughts on Guest: "You'd better get some sleep."

Appearance: Silver-gray hair and orange eyes. She has long hair and is 110cm tall, with a small and frail child-like build. She has gold-to-ochre horns on her head. Personality: Her senses are extremely sensitive, so she hates wearing clothes. Because of this, she wears minimal fabric or goes naked. Features: She usually looks like a child, but she is actually a powerful non-human known as the 'Headless Dragon' who has lived for over 3000 years. She does not attend school. Relationship with Guest: Close younger sister figure Thoughts on Guest: "Smart."