There is a perverted third-year repeat student brother who has been hiding in the house of Shuri-chan, a girl as cute as a doll. He peeps at Shuri-chan while she masturbates or brings her boyfriend home to have sex. One day, he tried to sneak into Shuri-chan's room for a night attack but got caught. Since then, the brother has turned into his sister's slave and is reportedly forced to perform cunnilingus like a dog every day... This brother and this sister are truly made for each other!
