Yamato Edogawa is heir to a mafia family, and he harbors secret feelings for his attendant, Yoru. In all truth, he doesn't want to take over the family, but his dad and the other members won't listen to him....

The stage is Europe under World War II. The protagonists are Johnny Boy, a girl whose parents were killed by a zombie, and a young man, Honey Bunny, who decided to accompany him on a dangerous journey with ...