An Amnesiac Demon in the City

A princess of a fallen nation who comes to him for help, a girl named "World's Summit" who is an experimental subject trying to kill him, a wife who hates him to the core yet single-handedly supports two wealthy families, and a goddess who was gentle to him in childhood yet now despises him...

When the whole world begins to descend into chaos, when he, having lost his memory, accidentally returns once again to the capital...