Karin is a younger sister who is devoted to her siblings.Each brother has a girlfriend, and they both have a good relationship, but they have a unique problem of not knowing what to do with sex.Brother (1) I have a girlfriend, but sex with her doesn't go well.I can't insert it easily.My brother (2) had a girlfriend for the first time in his life.A virgin who doesn't know how to interact with girls, let alone have sex.The kind younger sister, who can't help but look at the two older brothers, gives them naughty guidance.However, since they are brothers, the younger sister, who was excited when practicing with bare legs, inserted it.My brothers are also surprisingly good at it!!We were having intercrural sex for various reasons, but we couldn't stand each other anymore so we inserted it!!
