Yui was in love with her tutor Kana, unaware that she was a trans woman. During their graduation trip, Yui fell into penile-vaginal sex with Kana. However, upon learning that Kana had a boyfriend, Yui demanded anal sex as a last resort. Despite Kana's reluctance, Yui penetrated her anus for pleasure! The perverted lesbian caresses that unfolded in Yui's home turned Kana into an anal lesbian slave who could never leave again.
