Nana to Kaoru

Nana to Kaoru (ナナとカオル, Nana to Kaoru, lit. Nana and Kaoru) is a Japanese manga series by Ryuta Amazume. The series is known for its explicit graphic content regarding bondage and S&M. An original video animation made by AIC PLUS+ was shipped in March 2011.

Story
Nana and Kaoru are next door neighbours and schoolmates, but Nana is a model student and popular, while Kaoru is a poor student and social outcast. One night, however, their relationship changes forever, when Nana discovers that she enjoys being on the receiving end of perverted domination play with Kaoru.