The younger sister took advantage of her parents being away from home to give her brother an aphrodisiac and the end result

Bracon Rin, who loves her older brother, really wants to make love to her older brother, but her older brother, who has common sense, doesn't consider her sister a sexual object at all. Helpless, her younger sister resorted to the last resort of using aphrodisiacs, and no matter what happened, she invited everyone to continue watching the movie.