Kirino, Natsuo

A young Japanese woman is pulled into her sister's dangerous life as a prostitute after her sister falls victim to a brutal murderer.

Masako Katori has spent years searching for a way out of her dead-end life, until one night when she snaps, strangling her dead-beat husband and seeks her fellow employees' assistance in disposing of the body.

Four teenage girls living in the suburbs of Tokyo, Toshi, Terauchi, Yuzan, and Kirarin, are doing their best to focus on summer school classes, in preparation for college, but when Toshi's neighbor is found murdered the girls suspect his son, a high school classmate they nicknamed "Worm.".