Murcielago manga volume 22 features story and art by Yoshimurakana.

Celine Argente, an internationally wanted perfumer adept in the art of killing with poisons, has entered Japan with a group of conspirators, and among them is a former member of the Metropolitan Police Department! While their aims and their employer’s identity are shrouded in mystery, their work is about to begin. An invisible poison creeps through the streets of Ruruie City...