Tomorrow my girlfriend is on a business trip, so tonight I go to her house to sleep for the night. In the house Tsukasa Aoi is her younger sister, a very hot girl. The next morning, my girlfriend left early, I woke up late and hurried home. But when I got to the door, Tsukasa Aoi called me, she had just finished taking a shower and just wrapped a towel around her. What do you mean by Aoi, I'm going to fuck her.