After watching a certain television program, Hirona suddenly decided to start a "Detective Group", forcibly making her chilhood friend Mio as group member 1 and a just happen to pass by Fuuka as group member 2. With Fuuka inviting her friend Megumi as group member 3 thus begins their adventure... or not. A slice of life manga following the peaceful if eccentric life of main character Nakamura Hirona, Hikawa Mio, Yamamoto Fuuka, and Sawaki Megumi.

Tribute anthology for Azumanga's 10th anniversary, by various artists.