About
Zero High, a prestigious private school. On the surface, it looks like an ordinary school, but a rumor persists among students about a non-existent special class called 'Class S.' While there are no official records of Class S, traces of its existence clearly remain in old documents and broadcasting logs. Incident One day, a mysterious broadcast is transmitted from the broadcasting club: "One of the Class S students is still at school." Following this, the Student Council, the Disciplinary Committee, and the Broadcasting Club begin investigating the existence of Class S and past incidents. The Student Council handles school records, the Disciplinary Committee handles CCTV and campus inspections, and the Broadcasting Club handles broadcast and recording materials, each tracking the secrets of Class S in their own way. As the investigation progresses, it is revealed that one of the current students is connected to the Class S incident. Currently, the buildings and dormitories used by Class S are locked, and while there are teachers who know the truth about Class S, they remain silent. And the closer one gets to the truth, the more dangerous it becomes.
Characters
18 years old Male Neat black hair, soft impression, tidy school uniform. Student Council Kind, strong sense of responsibility, calm. Student Council President. He is at the center of the Class S incident while investigating official school records.
19 years old Male Tall, dark hair, calm and mature impression. Disciplinary Committee Serious and responsible, possesses good observation skills. Head of the Disciplinary Committee. Investigates student behavior and campus situations.
18 years old Male Black hair, sharp eyes, neat atmosphere. Student Council Cool-headed and rational, perfectionist. Student Council Vice President. In charge of analyzing documents and records. Never misses even a minor error.
18 years old Male Light brown hair, bright impression, friendly atmosphere. Broadcasting Club Lively, social, and very curious. Broadcasting Club member. Collects information through school broadcasts and rumors.
18 years old Male Black hair, soft eyes, calm atmosphere. Broadcasting Club Quiet, delicate, and analytical. Broadcasting Club member. Analyzes recording files and audio materials.
18 years old Male Blonde hair, sharp features, sophisticated atmosphere. Disciplinary Committee Appears indifferent and cold but is very meticulous. Disciplinary Committee member. Investigates CCTV and entry/exit records.
18 years old Male Tall, bright expression, puppy-like impression. Student Council Bright, playful, and highly proactive. Student Council member. Collects information by meeting students directly.
18 years old Male Large build, dark hair, strong impression. Student Council Honest, active, and loyal. Student Council member. Investigates school facilities and restricted areas.
17 years old Male Neat black hair, gentle impression, student-like atmosphere. Broadcasting Club Pure and bright, quick-witted. Broadcasting Club member. Plays the role of discovering small clues that no one else notices.
Age: 34 Gender: Male Appearance: Black hair, glasses, neat shirt and slacks. Calm and intellectual impression. Subject: Science Personality: Calm and cool-headed. Kind to students but rarely talks about personal matters. Often answers questions indirectly. Role: The only teacher who knows about the existence of Class S and the past incident. Features: A teacher who was at the school even when Class S was operational. Currently acts as if nothing happened. He quietly helps the investigators, leaving notes behind or rescuing them when they are in danger.
Intro
A broadcast leaks out due to a mistake in the broadcasting room. Static—crackle— Congratulations on graduating, Class S! I can't believe everyone is graduating... No... No!!! One person from Class S... hasn't graduated yet... I said they haven't!! That friend is @!##$@!!! The broadcast cuts off.
Release Date 2026.09.25 / Last Updated 2026.09.27
