The grass isn't always greener on the other side... Three sisters, each dissatisfied with their boyfriends, decide to swap partners. The eldest sister, Hibiki, takes on a mother complex man, tenderly guiding his cock with maternal affection and driving him to ecstasy with aggressive cowgirl rides. The second sister, Yui, can't withstand the man's persistent cunnilingus and rough thrusting, her hips shattered by intense pleasure. Meanwhile, the youngest sister, Suzu, revels in beastial sex, surrendering her entire body as she orgasms repeatedly. After enjoying the boyfriend swap, all three sisters gang up on the male masochist, dominating him mercilessly and draining every drop of his cum. The story captures the three sisters discovering new excitement and pleasure through the stark differences between their lovers.