A manga series based on Aotsuki Kairi's novel of the same name.

Kanna, a serial killer so deadly that the media has nicknamed him "The Reiwa Era Jack-the-Ripper," asks each of his victims the same thing: "I'm only looking for love. Why can't you tell me where it is?"

The story begins when he meets a beautiful young man named Mikage, who tells Kanna that he will give him the love that he seeks, but only if Kanna agrees to join him in "The World of Sinners."