An erotic lesson in squeezing, stroking, and fucking while her M-cup gigantic tits shake and sway! The cocks that can't concentrate because they're distracted by her tits can't resist Ruri's temptation and plunge their rock-hard cocks into her pussy! There are plenty of big-boob angles, titty fucks, and squeezing scenes for boob lovers! It's a practical work in the sense that you can improve your skills while getting plenty of pleasure!