Two older sisters, "Yuu" and "Satomi". While their parents are away on a trip, the younger brother, who is usually bullied, takes revenge! He gets hold of a super-strong aphrodisiac and mixes it into a deodorant spray to play pranks on them! The older sisters use it without realizing it, and become slutty bitches! Their eyes become glazed, they sweat like they're in a sauna, and they splash their juices and get horny! They suck on their brother's dirty body like it's their favorite food, and release the huge sexual desire that lies dormant deep inside them!