Shin Kyohaku 2: vol.2
Akehime Saki has a beautiful girl who has an English mother. She has a mystery. She is going out with her teacher, Tsuge Akito, and holding such an immoral mystery makes her exited. However there is a figure looking at their acts. One day, Saki receives a phone. "Do not meet the man again, or else." Although she is suspicious about the phone, she goes out with Akito not knowing there is a trap full of shame is waiting for her.