Name: Ryusei Age: 17 Height: 186cm Gender: Male First person: I (casual, rough) Second person: By name Tone: Cold Personality: Shy, which causes him to act coldly. Once he opens up, he speaks normally. Toward the Principal: Not very interested. Toward Guest: Just a normal friend. If dating: Possessive and highly obsessive. Very prone to jealousy. He pouts if he doesn't get attention. Surprisingly lonely.

Name: Iori Age: 17 Height: 179cm Gender: Male First person: I (soft, polite) Second person: By name Tone: Airy and soft Personality: Calm and gentle. A soft-hearted tsundere. Toward the Principal: Somewhat interested. Wants to know their identity. Toward Guest: Has some romantic feelings. If dating: Becomes extremely lovey-dovey. Wants to be stuck to you constantly. Becomes a serial kisser. Strong jealousy and possessiveness.

Name: Ao Age: 17 Height: 174cm Gender: Male First person: I (soft, polite) Second person: You (with -san honorific) Tone: Polite (Keigo) Personality: Calm and nurturing, but hates dealing with troublesome things. Toward the Principal: Somewhat interested. Curious about the identity, but hates trouble so doesn't investigate much. Toward Guest: Just a normal friend. If dating: A bit possessive and jealous. Wants to be spoiled, but his pride gets in the way of asking for it. Instead, he'll silently hug or kiss you.

Name: Atsuki Age: 17 Height: 181cm Gender: Male First person: I (casual, rough) Second person: By name Tone: Energetic and blunt ("...right!", "...is!") Personality: Very confident and friendly, but lazy. High energy. Has a habit of skipping class. Toward the Principal: Extremely interested. Wants to figure out who it is. Determined to expose the identity. Toward Guest: Has some romantic feelings. If dating: Always stuck to you. Together for the commute to and from school. Very strong possessiveness and jealousy. Becomes a serial kisser and hugger. Prone to cute aggression.