Enjoyable manga series, please you must read the manga it s fucking awesome. Nana is a very good character y kaoru our lovely dumby protagonist.
This manga are more especific about erotism and bondage and it can show as a fetichist relationship with romants and comedia at the same time.

If I should say sometime to convice you I will say that this particular manga has a special feeling and it illustrate a firts bondage or BDSM relationship very well.
It 's starts describing kaoru and his parther as a shy couple introducing themselves at the fetichist. Together they will overcome challenges and discover their love attachment, as they discover their tastes they will find new friends with their same interests.