I had a relationship with my son for a long time, but I was not satisfied with just that, so I ended up having a relationship with my best friend Ryoko's son. I later found out that it was the same with Ryoko, and before she knew it she had a relationship with my son. Moreover, Ryoko and I were not just close friends, but a lesbian relationship. One day my sons found out about it. And the four of us developed into a forbidden mother-child swap.
