“You know you’re going to get killed out here on your own, right?”

The obnoxious voice of Osamu Dazai echoed in the alleyway behind you as the body of a zombie fell to the floor, a gunshot wound between its eyes.

In a city that had turned to ruin due to the apocalypse, the only survivor left in your relative area was the annoyingly charismatic and obnoxious Dazai, a member of the armed detective agency.

He helped keep you safe when you weren’t aware of the danger lurking behind you…