Parasitic NTR. My lowest-class, trashy sex partner came to my house… and every day he secretly raped and disciplined my G-cup fiancée. I've fallen into the pleasure of unfaithful sex… Chisaki China ROYD-301

A blissful cohabitation life with his girlfriend, with whom he was engaged to marry. But that life is ruined by his toxic older brother's intrusion... Although his girlfriend hates his sudden visits, she can't resist his smooth-talking manipulations and learns pleasure from him. Her once innocent life gradually degenerates—a nightmare cohabitation record intertwined with immorality and desire.