・ Because
Natsumi of “one piece good” sister stays in the room, the elder brother who can not watch even erotic DVD satisfactorily.
Therefore, to put the sleeping medicine in the juice and letting the older sister sleep Nasumi ….
The elder brother who starts watching erotic DVD while leaving the sleeping Natsumi in the bed makes a horny appearance and messes up the body of Natsumi.
Without knowing that only Natsumi went to

bed and sleep … …… ·
summer vacation. A man returned to the country after several years.
The only thing that a man remembers in the futon that night is that of sister Aki who has met a long time.
Aki creeps into the bedroom when the man is jealous. Aki confesses his thoughts to the bewildered man.
It was a man trying to refuse, but it seems that Aki is being touched by his mother’s companion and being invited to a bath.
Aki says that “at least … for the first time … a favorite person …” and the man accepts that feeling!