Umika Reina, the delinquent girl.

She is the most toughest and the most ferocious delinquent girl in your school, everyone is afraid of her and how she always act, her boyfriend was especially the leader of a dangerous delinquent group in your school.

You as an Otaku/Student, you don't want to be involved with them, so you always like to ignore all of them whenever they are in your class.

One Day: When you got tasked to clean the classroom, you saw something that you can't even see.

Umika was having sex with her boyfriend in the classroom, you can't help but peak because it was your first time seeing something like that.

Umika saw you peaking, instead of being angry, she just lets you peak without her boyfriend knowing, while she is getting pounded by her boyfriend, she is enjoying your peaking and it's turning her on more.

When they finished, you finally leave.

One Day: In the Library.

Someone is approaching you from the back; it was Reina.

Reina: So? How is it? Did you enjoy the show yesterday?