How did this happen? Takuro was confused. Time went back a few hours. His wife went on a two-day trip, and just when he thought he would have a chance to relax for the first time in a while, her sister, Akari, came to visit. Even though she was just visiting, Takuro opened Kokoro to Akari, who helped with the housework, and allowed her to stay. He never dreamed that Akari had come to relieve his sexual desires... Time went back to the present. Takuro was being pressured by a naked Akari in the bathroom. His reason began to waver as he felt her breasts pressed against him...