Renjaku-san to Asobo

Junpei Sakai, who lacks self-confidence, meets a mysterious girl named Murasaki Renzaku at the high school he entered. She says she came to the high school to have fun, and Junpei is invited to play with her after school. But there seems to be a secret about her...?! This is the secret after-school life of the free and mysterious girly and a boy, who lacks self-confidence!