鈴木えんぺら-電子版限定特典付きガリ勉くんと裏アカさん-1-散々お世話になっているエロ系裏垢女子の正体がクラスのアイドルだった件 (Associated Names)

Tsutomu is a boy with excellent grades, but his secret hobby is spying on the backstage of erot*c girls on social networking sites. One day, he happens to help a class idol, Marika, and notices that she and RIKA, his favorite girl, have something in common. He unintentionally makes a pass at her and discovers…