Drinking at home with 4 club members! Everyone got excited, and everyone except Yumi and the plain guy fell asleep. Then Yumi reaches for the plain guy's dick, saying "Let me see it for a moment." The plain guy's dick, who is usually not very noticeable, is much bigger than Yumi imagined, and Yumi can't help but suck it. That day ends with just fellatio, but Yumi, who is captivated by the plain guy's big dick, wishes "I want to be fucked with that big dick...". When she invites the plain guy and has sex, she is subjected to unexpected S-play such as irrumatio and strangulation, and her vagina clenches! Her dominant masochistic perversion blossoms, and she seems to want more dick...
