Maigo

1) Lost Children
Koyo Tomohiko and Fukube Naoto are childhood friends. But when Naoto gets a girlfriend and doesn't have much time for Tomo anymore, Tomo's pissed! But is friendship the only thing Tomo feels?

2) Diamonds are Forever
Taki Chisato and Kamitori Taichi have been goofing off instead of studying. Now their tutor, Taki's cousin Atsushi, is punishing them for wrong answers... by making them kiss each other?!

3) Continuation of Diamonds are Forever. Chisato and Taichi are dating, but Taichi wants some of the physical benefits of dating.

4) Golden Star
Third year junior high student Murakami finds himself watching stoic classmate Takahashi play the piano ...