Akehime Saki has a beautiful girl who has an English mother. She has a secret. She is going out with her teacher, Tsuge Akito, and holding such an immoral secret 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...