A beautiful girl who rivals idols transforms into a lewd and vulgar little sister! Kana-chan has become a premature ejaculator because she cums too much on her ovulation day! She can't stop loving her big brother and masturbates vulgarly! She seduces her big brother and cums inside him! She repeatedly uses dirty talk to seduce him! Don't miss her cumming in her cute pajamas! An intimate love story!