The hero of the hentai, forgot his smartphone at school, and after school, he returns to class to pick it up. But he can't find it where he left it. A little later, his classmate enters the classroom with his smartphone, but the fact that she found it is half the trouble, the main problem is that she looked through all the history on this phone, and began to blackmail him by saying that everyone will tell about the perverted content of the phone, if the main man will not comply with her demands, namely to undress. What's on her mind...