Kazuki Okino is an ordinary student. While he leads a slightly hectic life, there is happiness in it, too. It's the two women in his life who make him happy. Rinka is his younger sister. She loves joking around and embarrassing him, but she loves Kazuki dearly. There is also Otome Sakuragi, his childhood friend. She's a year older than him, and she takes care of him any way she can. She's beautiful, has a great body, and is admired by all the boys in school. Otome taking care of him has become an integral part of his life. As his sister enjoys pointing out, Otome and Kazuki look just like a newly married couple. While they're obviously in love with each other, neither has made the first move yet, so they aren't officially a couple. Even though their relationship has not evolved beyond childhood friends, Kazuki believes that if he waits, They will naturally start dating and eventually get married later on. Now he has to be patient and let all the good things come to him...

The DVDs showing Otome in compromising situations never stopped showing up in Kazuki's mail. In the recordings, Otome forgets about Kazuki and eagerly accepts the old men's dicks. Kazuki watches in shock as an unbelievable spectacle plays before his eyes. His own sister, Rinka, was enjoying sex with one of the old men who forced themselves on Otome. Otome, Kazuki and Rinka's story comes to an end...