Oshi to Deaitakunai Joshidaisei

The story follows Mai, a college student, who joins a band because of her idol, the bass player and content creator, Single Manbou. However, she meets Mitsui, her classmate, who turns out to be Single Manbou himself! She doesn't want to get too close to him and doesn't want to be revealed as a fan, but for some reason, Mitsui keeps getting closer and closer to her...?