The Absolute Worst Love Story in the World -My Fiance's Little Brother Turns Me Indecent-

"Do you always have that look on the face when you make love? It's so filthy!" The man who made love to her body that was so overflowing with passion turned out to be the younger brother of the fiancé she hates. Mizuki is a woman fed up with the terrible treatment and frequent infidelity of her fiancé Taiga, a man chosen by her parents. Wanting to forget everything she barges into a bar, where she meets and ends up having sex with the young bartender, Ren. "I think I'll mess you up even more." Thrust into by Ren and his youthful passion, coveted with a vengeance, she feels her withered up heart be fulfilled. Mizuki flees the scene of guilt, but when one day introduced to Taiga's younger brother, she realizes it is without a doubt the young man from that day, Ren... --She tried so hard to forget him, but somewhere deep within her body still remembered the passion of Ren.