Shuri-chan, a cute girl like a doll, has a lascivious older brother, Sannami, who has been lurking at home all the time and is peeping at the place where Shuri-chan is masturbating and the place where she brings her boyfriend and has sex. One day, I sneaked into Shuri-chan's room at night ● I tried to do it, but it got caught, and on that day my brother became a servant of my sister, and my sister forced me to cunnilingus like a butter dog like a daily routine. It seems that ... this brother has this sister!