My newlywed life was peacefully progressing at my wife's parents' house, but everything changed suddenly with my sister-in-law's return home. Under the same roof with my stepmother, my wife, and myself, my sister-in-law begins aggressively seducing me beyond resistance. Her advances aren't limited to direct approaches—she even stages explicit sex with another man right before my eyes. The assault continues in various settings, including the bathroom and the bedroom where I sleep beside my wife. Gradually, my self-control crumbles until I finally cross the line. In the end, both my heart and body become completely captivated by my sister-in-law, leading to a shocking and intense NTR storyline.