Skirt No Naka Wa Kedamono Deshita summary:

The beautiful girl who brought me to the peak of pleasure isn't a girl at all! "I just couldn't help myself," he says in a deep voice, licking my most sensitive area. Shizuka goes to a drinking party, but she can't adjust to the mood. Just then, a stunning woman named Ryou approaches her. They ditch the party to have a drink together and quickly hit it off. Shizuka ends up going to Ryou's place afterward, where Ryou suddenly forces her into a kiss. "She's a lesbian!?" Shizuka thinks so at first, but Ryou's body feels unusually hard below the waist. Could Ryou actually be a man? Shizuka's mind goes blank as Ryou's fingers thrust into her deepest area.