We Who Know Nothing of Love(NaN)

When they were middle school students, Eiji Aihara and Naohiko Bessho attended the same school and they were best friends. One day, Eiji's childhood friend Izumi Shiosaki transferred to their school. Eiji had feelings for Izumi, but he never told her how he felt. Naohiko though confessed his feelings to Izumi and they became boyfriend and girlfriend. Now, all three are first year high school students and attend the same school. There, they meet Koharu Fujimura, who begins to have feelings for Naohiko, Taichi Senami, who is a member of a band, and Mizuho Ikezawa, who is a literary girl and likes Eiji.