堕淫 ～屈辱のカミングアウト～

The main character works at a shop in a girl's high school. One day, he accidentally gets a notebook in which the secrets of ten girls are written. It seems the notebook is owned by a missing his predecessor.... He doesn't know how he got it but the secrets are written in detail. Also, there are their photos taken secretly and recorded voices.... By using it, he can control them as he likes... but his conscience stops him.... He tries to forget about it but his suppressed sexual desire arouses day by day and...