Mouryou no hako manga

Mouryou no Hako summary:

Second in the Hyakki Yagyou series, adapted from the eponymous novel by Kyougoku Natsuhiko. The story follows a series of bizarre murders of schoolgirls who have been dismembered and stuffed into boxes. The private investigator hired by a missing daughter's mother joins forces with an antique book seller and others to unravel the mystery.