Nanao Riona and Yui Kawagoe teamed up to produce MILK's first NTR work! The two, who are also good friends in private, chose the perfect "sisters" situation! Riona, the younger sister, seduces Yui No boyfriend, but he can't resist Riona's amazing technique and ends up having sex with her. Yui then shows off her amazing technique to get him back! At the end, the sisters have a 3P creampie showdown! They decide which pussy feels better!