Houkago, Rabuho de, Sensei to.

"Isn't this what this place is for?" Pressed down by her math teacher in the S&M room of a love hotel...!? What should I do? I can't run away...!! During the day, Kanna is a high school student, but at night, she's the owner of a love hotel. Of course, it's a secret from everyone at school. Her grades have fallen to the brink of repeating a year due to her busy everyday life. But she's secretly happy to have a private lesson with her crush, Mr. Saito. Then, one day, she sees Mr. Saito and a woman entering her love hotel...! What!? Mr. Saito, in the most popular S&M room! The kind teacher at school is actually...!? Just as she was wondering, she accidentally runs into Saito-sensei! What's going to happen with them?