Iguchi Kon

A mysterious informant has appeared, catching serial killers that the police don't even know about. Among the police who rush to the scene after receiving the call is Shiro Isogai, a police sergeant from the Public Safety Division, which is supposed to be outside his jurisdiction. He is trying to get to the bottom of the identity of the mysterious informant in order to catch the serial killer who murdered his fiancée. And he finds out... a young girl in her 20s, Hinata Kuroi.

A fantasy survival where three people (a prisoner of war, a cook and an alchemist) struggle to survive on an uninhabited island! What do you have to do first on an uninhabited island? How do you secure a water source? What is the point of collecting food? Overcome a tough but a little fun life with alchemy!