Senior's Treatment - Mayumi Houjou in the Literature Club

"If you want me to keep this a secret, masturbate in front of me. Right here..."

The main character of the story is an ordinary Japanese boy who loves to write various sexual stories about his female classmates in his diary. However, one of the stories was dedicated to a sweet girl from the literature club named Mayumi. The guy described how he took her in various positions right in the library. And here's the trouble, our hero lost his secret diary somewhere in the library... Soon the hero was exposed by Mayumi and now he has to undergo a course of "treatment"...