Based on the Maicching Machiko-sensei Manga.

Kaoru is a 17-year-old virgin who has an SM fetish. He secretly dreams about an SM relationship with his childhood friend Nana. One day Kaoru's mom asks Nana to hide all his SM toys so he'll study for a change. However, Nana finds the leather one-piece that Kaoru bought and tries it on, but she accidentally locks it and doesn't have the key! The beginning of super strange relationship.

This is the first installment in the "Shikoku Pilgrimage" series of horror documentaries in which horror storyteller Junji Inagawa visits haunted places and verifies the truth behind them. In Tokushima Prefecture, he visits an abandoned drive-in that is rumored to have been closed down after its half-crazed owner was admitted to a mental hospital, and conducts an on-the-spot investigation.