優等生のウラのカオ ~実は裏アカ女子だった隣の席の美少女と放課後二人きり

[DeepL Translation - needs review] I'll do something good for you if you keep the backstage stuff a secret, okay? 90% impure, 10% pure love" - this is a secret relationship between two people.

If you keep it a secret, I'll do something nice for you. Akito Aisaka accidentally discovers that the honor student sitting next to him, Mamiya Yuu, is a "backstabbing girl. She tries to keep him from talking, but he agrees to go along with the photo shoot. Hey, let's do something even more amazin...