Mai Tsujimoto

Japanese schoolgirl Sakura has her idyllic small-town life turned inside-out when the local men start savagely killing the women. Armed with only her kyudo bow for protection and an English textbook for comfort, Sakura journeys through an apocalyptic world of mayhem.

In a small town with a big red bridge, a run-down apartment, which everyone calls a haunted house, stands still. A few days before the summer break begins, two high school girls, Kaede and Azusa, find a boy living in the abandoned place by himself. Naming him "Mon", they take care of him without being noticed by anyone.

Protagonist Shinji Aratani is a man who lost everything around him—successful career, family, and friends—due to a twist of fate. His current job title is Chief of Registry Supervision Division of Ministry of Justice. Colleagues in other divisions look down on the Division saying nobody cares about their job and it's unneeded. But what they don't know is that the Division's true duty is to accomplish the top-secret mission from Parliamentary Secretary of Justice to "isolate time travelers in a special residential district and keep them under a close watch." In the near future, it's expected that time machine will be invented and there will be time travelers, each with their own purpose, coming back from the future to the present time. Registry Supervision Division was newly established in order to not let these time travelers change or affect the present and also to prevent big confusion from happening when the existence of time travelers gets revealed.