A monkey who is asked to exchange locks by a female teacher with big breasts, Matsunaga and a beautiful high school girl, and the excitement cannot be suppressed. A monkey who visited a dream paradise, a girls' high school with her bad friend Yamamoto, confirmed the key to the basketball club room. No matter how many times the key is exchanged, it will be stolen. The monkey looks at the keyhole and notices that it is opened with a master key instead of picking. However, she is confused that Aya and Matsunaga, who own her key, do not lend the key to anyone. On the way back, Monkey and Yamamoto went to the music room as soon as they read the article "The Spirit of a Nasty Female Teacher Appearing in the Music Room", the seven mysteries of a high school girl posted in the corridor.
