A lesbian world unfolding the mysterious relationship between mother and daughter. Haruka, a foreskin-covered single-ball mom, and Karin, her daughter with a thick, large-headed cock. Raised in a single-parent household, the two reveal their "mighty cocks" directed toward the daughter at puberty. One day, the mother discovers her daughter masturbating, and at that moment, a "magnificent cock" emerges from the mother's crotch. Deep kissing, blowjobs, pussy licking, bareback creampie—various acts weave a shocking narrative. The forbidden bond between mother and daughter descends into a whirlpool of desire.