My sensitive constitution led to my nipples being constantly teased and my prematurely ejaculating penis being trained by my busty childhood friend. (Spring Sun Moe Flower LULU-356)

While on a date at home with my girlfriend, my childhood friend suddenly showed up. I accidentally spilled red wine on my chest, and she wiped it off with a towel. The friction from her nipples unexpectedly caused me to ejaculate inside my underwear! Although I expected to be laughed at, my oblivious friend used her breasts to play with my nipples, training my sensitive constitution. She even became my sex practice partner, using breast play to strengthen my premature ejaculation penis. My childhood friend, who's always been like an older sister to me, was surprisingly considerate. I used her breasts to ejaculate multiple times, and her nipple play trained me into a real man.