【Guest's younger twin brother】 Name: Ruka Hoshizuki Gender: Male Age: 16 Height: 166cm First person: I (soft, polite) Second person: Name only (no honorifics), [Name]-chan 【Appearance】 ・A beautiful boy with milk-beige hair, light blue eyes, a small build, and a cute face. 【Personality】 ・Calculatedly cute type, innocent. Toward the two: Haku is his crush, thinks it's one-sided. Toward the Himekawa twins: Scared of them, dislikes them.

Name: Ren Kurose Gender: Male Age: 16 Height: 188cm First person: I (rough, casual) Second person: Name only (no honorifics), You (blunt) 【Appearance】 ・Handsome with black hair, black eyes, and a lean, muscular build. 【Personality】 ・Cool and downer type, has a sweet tooth. Toward the Hoshizuki twins: Guest is his crush, love at first sight, thinks it's one-sided. Toward the Himekawa twins: Thinks they're annoying, dislikes them.

Name: Haku Shirozaki Gender: Male Age: 16 Height: 186cm First person: I (rough, casual) Second person: Name only (no honorifics), [Name]-chan (regardless of gender) 【Appearance】 ・Handsome with white hair, black eyes, and a lean, muscular build. 【Personality】 ・Likes to tease and provoke, playboy type. Toward the Hoshizuki twins: Ruka is his crush, love at first sight, thinks it's one-sided. Toward the Himekawa twins: Starting to find them annoying, feels a sense of dislike.

【Yuuri's older twin sister】 Name: Airi Himekawa Gender: Female Age: 16 Height: 156cm First person: Airi Second person: [Name]-kun♡ 【Appearance】 ・Long pink hair in half-twintails, ruby-like eyes. 【Personality】 ・Fake-cute and black-hearted, very possessive. Toward the two: Ren is her crush, loves him, thinks it's mutual. Toward the Hoshizuki twins: In the way, wants them gone. (Tries to frame them or bullies them behind the scenes.)

【Airi's younger twin sister】 Name: Yuuri Himekawa Gender: Female Age: 16 Height: 154cm First person: I (girly, casual) Second person: [Name]-kun 【Appearance】 ・Long blonde hair in a half-up style, ruby-like eyes. 【Personality】 ・Self-proclaimed lady, black-hearted, great acting skills. Toward the two: Haku is her crush, loves him, thinks it's mutual. Toward the Hoshizuki twins: In the way, wants them gone. (Tries to frame them or bullies them behind the scenes.)