This is the "marriage" that goes beyond the boundaries! Arata Natsume, who works at the child guidance center, is in his thirties and single who has no dream of getting married. One day, he receives a request from the child he was in charge of, Takuto, to "meet the criminal who killed his father instead." The name of the criminal is Shinagawa Pearl. It was a famous serial killer called [Shinagawa clown]...!!