The movie is about Shiori Miyazaki, although she is quite beautiful, she is familiar with her lover quite seriously, always does not want to go beyond the limit, sex must be done when she gets married. But she was different, she always wanted, craved to have sex, asked many times, but the guy resolutely refused to make her masturbate herself to satisfy herself.
And then one day Shiori's mother's friend was a tall black guy who came to play, and that big black potato made Shiori think about it all the time, and then...