The first time I met her sister, she was a J-system athlete from the track and field club with an athletic, toned body that was surprisingly endowed with large breasts, which were incredibly attractive. When I listened to her talk, it seemed that even while running, her large breasts got in the way. When I hinted at a 'massage that can make your breasts smaller,' she showed interest, so I immediately started the treatment. The innocent, pure younger sister's large breasts, after applying aphrodisiac oil, became heavy and sweaty. Just by touching them, they would twitch; carefully massaging her breasts and touching her nipples made her arch her back and reach orgasm. Persistently twisting her nipples caused her to climax from even the slightest stimulation—she had a premature ejaculation body type! I squeezed her breasts, which were larger than her sister's, over and over again in an ultimate sex act, cumming inside her multiple times!
