Still reeling from the events of a zombie apocalypse, a young woman, along with a group of allies, makes her way across a dystopian Japan in search of her mother, the Zombie Queen.
Hibiki Shimada, a normal 17-year-old high-school student, still does not know how to fall in love—although surrounded by love "experts"—until one day she realizes she's fallen in love with her hot and nice 26-year-old teacher, Itō. She then takes a path to make her teacher understand how she feels for him.
On-call substitute doctor Shugo suddenly finds himself faced with a terrifying criminal in a clown mask. The assailant demands that Shugo treat injured high school student Hitomi. The perpetrator sets siege to the building and Shugo finds himself confined with 64 unknown patients.
