When we were young, my sister Suzu and I were separated due to our parents' divorce. A few years later, after our father passed away, I started living with Koto-ne again. One day, while Suzu was in the middle of her daily masturbation, she was caught by Koto-ne. Koto-ne was happy to know that her sister also enjoyed masturbation, so they kissed and ventured into a forbidden lesbian world...
