Three months into dating "Miu," I ended up spending a summer night at her place. That's when I met her older sister, "Wakana." She was wandering around the house half-naked, braless and pantless. Her constantly visible nipples and deep cleavage were driving me wild with excitement and an erection I couldn't control (sweat). I just couldn't hold back any longer... Braless and pantless?! For someone with my insatiable libido, it was too much stimulation (sweat). Her oblivious older sister, completely unaware of how sexy she was, was giving me such bold, unintentional temptations that I involuntarily got hard! There's no way I could resist this! My raging cock went wild! I couldn't stop my sweaty, intense thrusts, even with her girlfriend nearby. I couldn't stop ejaculating! Two shots! Three shots! I kept going! Wait, is her sister feeling it too? Her slender body was convulsing as she reached multiple orgasms!