A girls' high school that Mamoru attends has amalgamated a boys' high school, which was her wish for a long time. She expects that she will be able to find a boyfriend soon. However, boy students are around ten percent of girl students, and Mamoru is annoyed because her classmate Azuma, who's known for being dirty-minded, makes a pass at her. One day, when Mamoru was fighting against him as usual, he kissed her all of a sudden. What's going on?

Also contains two extra stories:

- Let's Study Together

- Where's the Love, Where Are You