In the crowded train, filled with desire, a man named Kusabiki Kiichi stands with his hood pulled low. His eyes can see through people's desires, and with his masterful technique, he plunges women into pleasure.

Fujito Iori, a student at Reimei University, doubted the existence of such a man.

"There's no way someone like that exists. It's just an urban legend," she said.

During her investigation into his existence, she encountered him and...