One day before summer vacation, on my way home from work, I suddenly heard the voices of men and women coming from the gym. Inside, the beautiful homeroom teacher Riona is immersed in adultery. A weakness is captured and Rina is attacked by students and is detained and imprisoned in the physical education warehouse. Build a school during summer vacation when no one comes to help. Riona continues to be passed around like a toy by many students. 11 days left until the new semester...