ROYD-191 My brother's wife and I were only supposed to have a kissing relationship… but we couldn't resist each other and we ended up licking each other's saliva, secretly having sex over and over again. – Momo Shiraishi

Momo, a wife, begins to feel uneasy as her heart drifts away from her work-centered husband. Meanwhile, she is attracted to her brother-in-law, with whom she lives, and a forbidden love begins. They promise to only kiss, and their secret love deepens. But their desires cannot be contained. Though she still has feelings for her husband, they cannot contain their passion for each other, and they cross the line and have creampie sex. This is the story of two people consumed by love and desire.