The mother and son of the mother and son

For Chiaki, his son koji was all the same for koji. The two who lived in the mother and child family had been connected by a strong bond. However, the dense relation had changed the shape to the one that was understood only by two people. Koji, who wanted to have sex, asked him to brush her. It was very natural for koji who believed that she would accept anything. And Chiaki did not think it was abnormal.