[Exclusive Mio Ishikawa takes on the role of a devilish little sister for the first time!] A tsundere little sister who loves her big brother too much tempts him with a panty shot! She decides to practice sex for her silly big brother who is excited about his first girlfriend! "Now my first kiss and first experience are mine!" It was supposed to be a one-time thing, but the temptation escalates further! She cums over and over again while repeatedly calling out "big brother" in a uniform blowjob, a subjective sex showcasing her panties, and a lovey-dovey close-up sex! Three scenes that must not be discovered! "I love you big brother //".