My only hobby was watching adult videos, and one day my classmate Mao Hamasaki suddenly showed up at my place. She used to be flat-chested, but now her big tits were impossible to ignore, with a deep cleavage that completely turned me on. She discovered the huge collection of AVs I kept hidden at home, and we ended up watching them together. When she noticed my peeping, my underwear was already soaked with pre-cum. A tense, aroused atmosphere built between us, and before long we naturally ended up having sex...!