Wife-Swapping Sex of Well-Endowed Brothers

Women completely hooked on the well-endowed brothers! The older brother’s girlfriend ends up with the younger brother, while the older woman next door gets a taste of the elder brother’s impressive manhood.

Cheol-soo introduces his fiancée, Ji-eun, to his younger brother, Won-gyoo, who disapproves of his prospective sister-in-law. Ji-eun, however, tries to win him over by exploiting a weakness she discovers about him. She keeps teasing her future brother-in-law, gradually gaining the upper hand, and the two eventually grow close through sex. Meanwhile, Na-kyeong, the innocent neighbor who secretly has a crush on Cheol-soo, finally confesses her feelings upon learning about the upcoming wedding and tries to seduce him. They, too, end up having sex.