Kurayami no Tenshi

The day before a murder involving the cursed diamond called "the eye of the Shinigami," Chiko-chan accidentally witnesses the victim, Yamagata, having an argument. Being the daughter of a policeman and the sister of a reporter, Chiko-chan is determined to uncover the mystery behind this murder!

This story is authored by U.Mia, a collective pen-name for Shoutarou Ishinomori, Hideko Mizuno and Fujio Akatsuka.