Straight Natural Obsession Part II

Chisato is currently in love with Shoma and is her sister. Kuu watches Shoma and Chisato having sex in the tub. She becomes wet, becoming jealous and drains out of the home decided to make it. Fantasy becomes reality when an ex fan of Shoma reappears and she pulls on Chisato into their den of debauchery. This three way love affair will complicate matters. What will Chisato and Kuu choose to do?