Sambar's life after entering high school.
When the campus is enveloped by the power of ghosts, everyone begins a terrifying nightmare that sleeps day and night. During the day, students in the school play with each other and respect their teachers. At night, in order to survive, the students at night resort to any means and lose their humanity.
Legend has it that if you can survive the night until graduation, you can leave this hellish place and truly graduate.
Mission: Hard-working middle school students!