He and Yokohama's soul in another world collided and merged with each other, so he became Yokohama. For his own safety, he played three roles: a port police station, an armed detective agency, and a special department with special powers. But when he passed by Radium Street accidentally, he felt its pain, so he also acted as Radium Street. On the way to protect himself, he came into contact with the protagonists of "Wenye".
Purpose: Travel through another world and protect yourself