Sisters Ayumi and Erika live next door to each other in an apartment building and are still close even after getting married. Although they get along well as sisters, it cannot be said that they are a good couple, and Ayumi has said that she wants to divorce her husband Tetsuya as soon as possible and live with Erika alone. Then, one day... Tetsuya, who wanted to have a child, inserted his raw penis into Ayumi and came inside her. "If I get pregnant with this man's child, I'll never be able to get a divorce!!" Just before the sperm was about to implant in Ayumi pussy, Erika came into the bedroom...