On the verge of marriage, Yuri enjoys loving sex with her boyfriend, passionately grinding against him as he creampie-fucks her bareback, trying for a baby. One day, her boyfriend's cute junior, the effeminate guy Rei, becomes too alluring—he starts sucking off Rei's hard cock and penetrates her tight, virgin-like anal with his huge dick. They passionately piston together, climaxing in mutual ecstasy, and he becomes completely addicted to Rei's ass. Desperate to win her man back, Yuri pleads, "Love my ass~," using her own asshole to reclaim him. A passionate battle unfolds, transforming their relationship into something entirely new.