My beloved wife is cheating... She justifies her affair even in front of my sister-in-law Yumeru, but I still believed she would come back. She saw me completely worn out and said, "Poor brother, I'll fill the void in Kokoro." A sudden kiss... I thought it would be fine if it would ease my loneliness, but my rough Kokoro was able to accept the forbidden affair. It's fun to be together... While my wife was cheating behind the scenes, I spent my days passionately devouring my sister-in-law. Yumeru had completely taken up residence in my Kokoro. But my wife was dumped by her lover and returned home...