[ROYD-146] The relationship with my brother's wife was supposed to be just kissing...but they couldn't stand each other, so they covered each other with saliva and secretly had inseminated sex over and over again. Mei Itsukaichi (Censored)

Mei's heart was drifting away from her husband, who was devoted to work. She begins to develop feelings for me, her brother-in-law who lives in the same house, and a forbidden love gradually blooms between the two... The two make a ``promise to just kiss'' and begin their ninja love. But my desire doesn't stop. As love and desire intertwine, Mei pours out all her feelings towards me, and even though Mei also has feelings for her husband, in the end they intensely desire each other and cross the line, leading to creampie... The destination of this love is destruction, or...