There is no man who is not attracted to breasts! Kazuo is no exception, and he was Kokoro by his mother Kaori's big breasts. He ended up having a relationship with Kaori and felt guilty, but... When he saw her breasts, which were as soft as mochi, he couldn't resist. His hands reached out impulsively and squeezed Kaori's huge breasts. With his father working away from home, mother and son began to desire each other's bodies...