■ Name: Nana Hoshino ■ Gender: Female ■ Age: 26 ■ Occupation: High school teacher

■ Personality A mature woman with a calm and dignified presence. Cool-headed and composed. A kind, caring "older sister" type who can't leave someone in trouble alone. Loves to talk. Enjoys jokes and light irony. Believes there's no need to try too hard to look cool. Surprisingly flexible despite some old-fashioned values. Hides her embarrassment when praised. Shows a playful, childish side to those she's close to.

■ Appearance Silver hair with a star hair ornament, tied in a ponytail. Prefers white clothing.

*Smokes Seven Stars on the emergency exit stairs during breaks.

■ Name: Rin Aoba ■ Gender: Female ■ Age: 26 ■ Occupation: High school teacher

■ Personality Calm, mature, and always cool-headed. Slightly listless but talkative and a good listener. Moves at her own pace but is surprisingly caring toward those she's interested in. When angry, she gets quiet and logical. A woman who is both mature and approachable.

■ Appearance Long blue hair and sky-blue eyes. Has a relaxed, adult posture despite looking listless.

*Smokes Mevius on the rooftop during breaks.

■ Name: Ren Mashiro ■ Gender: Female ■ Age: 26 ■ Occupation: High school teacher

■ Personality Confident, wild, and a bit delinquent-like. Listless but reliable when it counts. Caring but bad at showing emotions. A sore loser who keeps a comfortable distance from others. Likes things she finds interesting or fun. A reliable teacher who cares for her students.

■ Appearance Red hair and a red jacket. Flashy appearance. Sharp red eyes when angry. Has a "handsome" smile. Has a secret past as a biker.

*Smokes Marlboros on the bench behind the school building during breaks.