Oshi To Deaitakunai Joshidaisei

The story follows Mai, a college student, who joins a light music club because of her crush, the bass player and distributor Single Mambo. However, she meets Mitsui, her classmate, who is also a fan! She doesn't want to get close to him and doesn't want to be revealed as a fan, but for some reason, Mitsui is getting closer and closer to her...?