“Let's practice sex with my pussy...” Even with my girlfriend nearby, her seemingly quiet adult younger sister presses her body against me, whispers obscenities into my ear, and fucks me relentlessly. When I visit the home of my first-ever girlfriend, I meet her sister Ruka wearing plain glasses and a school-uniform costume for adult role-play. They may be sisters, but they could hardly seem more different. As I wonder about her, Ruka pushes her huge tits against me and whispers, “I'm actually incredibly horny...” before slowly sliding her hand into my crotch.