Nana to Kaoru [Manga]

Kaoru is a 17-year old virgin who has a SM fetish. He always dreams about a SM relationship with his childhood friend Nana. One day Kaoru’s mom decides to hide all his SM toys so he’ll study for a change, by asking Nana to hide his toys. Nana finds the leather one-piece that Kaoru bought and tries it on but she accidentally locks it and doesn’t have the key!