Drunk and horny, Kensuke finds Itsuki's girlfriend alone and can't resist teasing her, making her squirm and moan softly. She reciprocates, touching Kensuke's growing bulge, and they quickly move to the bedroom. They keep their voices down, adding to the thrill as they explore each other's bodies, Kensuke sucking Itsuki's nipples while she strokes his hard cock. She eagerly takes him in her mouth, then straddles him, riding him slowly at first before picking up the pace, her tight pussy gripping his shaft. They switch positions, Kensuke fucking her missionary style, her legs wrapped around him, until they both cum quietly, trying not to wake Kensuke's passed-out friend.