Nana to Kaoru  

Nana and Kaoru, ナナとカオル, Attache moi, 나나와 카오루

Kaoru is a 17 year old virgin who has an interest in S&M relationships, particularly with his childhood friend Nana. Despite their relationship deteriorating over time due to hanging out with different people and lack of seriousness towards education, Kaoru's mother gives some of his S&M toys to Nana for safekeeping. One day, while trying on the leather one-piece that Kaoru bought, Nana accidentally locks herself in it and cannot find the key. Kaoru comes to her rescue and frees her from the one-piece. After this incident, Nana realizes she may enjoy Kaoru's hobby more than she thought and they begin engaging in "breathers," which are meant to relieve stress caused by Nana's attempts at maintaining perfect grades and reputation.

Nana to Kaoru was originally serialized in Young Animal Arashi magazine, but moved to Young Animal on October 23, 2009.