This work powerfully depicts my obsession with my friend's sister's voluptuous buttocks. It begins with a scene where, one afternoon, I accidentally witness her defenselessly exposed buttocks while she's napping, leading me to hide and masturbate intensely. However, the tension is palpable when she wakes up sensing something amiss, discovers me, and scolds and threatens me. Subsequently, I'm treated as a sexual toy, with scenes including face-sitting cunnilingus, slippery buttock handjobs, anal twitching provocations, pile-driving big butt sex, and back-piston commands, culminating in ejaculation until my balls are emptied. The emphasis on big butt presses and impactful hip angles delivers exceptional visual impact. Having watched it myself, the realistic acting combined with powerful angles creates an immersive experience. The attention to detail in the buttocks' texture and movements is particularly appealing for fans. Overall, it's a compelling piece that masterfully blends tension and excitement, making it a must-watch.