隣の部屋では、妻が...そしてもう一人の男...

It was the image of his wife being on a rod of flesh by an ugly neighbor.... Kosuke's wife's being fucked by a stranger arouses her to the point of immorality. From that day on, he spends his days eavesdropping on his wife as she performs her sexual services for the neighbor. However, as he does so, his wife begins to change...