The student council president. At the start of the story his grades are just a bit better then Nana's but she starts to over take him after finding a way to relieve stress. He is in love with Nana but has yet to tell her and she appears to be unaware of the fact. He does not even consider Kaoru an obstacle to Nana, despite them being childhood friends, until his sister tells him there is something going on between them (for a price). It also doesn't help his chances that Nana's best friend has a massive crush on him.

Kaoru is in love with his childhood friend turned idol, Nana. Over the years, their relationship has become strained with the differences in their lifestyles, but Kaoru still fantasizes about Nana helping him realize his ultimate fantasy... a BDSM relationship with her! One day, Kaoru's mother finds his toys and gives them to the ever responsible Nana to rid her son of his fetish, but Nana finds a leather piece and accidentally locks herself inside! This moment awakens something inside of Nana, whose stressful life could use some fun and could be the start of Kaoru's ultimate fantasy...
 
(Source: Denpa)

Kaoru is a 17-year-old virgin who has an S&amp;M fetish. He has always dreamt about an SM relationship with his childhood friend Nana, who is looked upon as perfect and is always the target of boys' eyes. Their relationship has somewhat deteriorated through the years, due to them hanging out with different people and because Kaoru is not taking his education too seriously. 
One day though, Kaoru's mother gives some of his S&amp;M toys to Nana for safekeeping - Nana finds the leather one-piece that Kaoru bought and tries it on but accidentally locks herself in it and doesn't have the key! 
Kaoru frees her of the one-piece, but then Nana realizes she may like Kaoru's hobby more than she thought and subsequently the two of them start engaging in so-called "breathers". These breathers are intended to relieve Nana of stress, stress originating from her attempts at keeping her grades and her name perfect.

__Circle:__ Jidou Hanbaiki (じどうはんばいき)

He entered Waseda University in 1994. His real family name is Nakagawa.

[Twitter](https://twitter.com/arogiso)


Hiroshi Yagami