Mugen ShinshiMugen Shinshi.

Mugen Shinshi (Japanese: 夢幻紳士, Hepburn: Mugen Shinshi; "Dream Gentleman") is a Japanese manga metaseries by Yosuke Takahashi. The story follows the adventures of Mamiya Mugen, a teenage detective from the Showa era Japan, retold in multiple alternate continuities. The second and main series was loosely adapted into an OVA in 1987, while a live action film The Dream Manipulator Mugen was released in 2021.