The mother-in-law and father-in-law became lovers, the same time as the marriage of Yeong-eun and Jeong-sik. The dizzying cohabitation of middle-aged lovers who stay hotter than a newlywed, and a newlywed couple who can't even burn hot as half of it begins.
Jin-woo lives in his friend's house and he likes his friend's sister. Although he has a girlfriend, he's constantly looking for a chance to approach the sister. However, he doesn't get the nerve to do so until he approaches her with the excuse that wearing a woman's panties on an important day brings luck.
Dae-goo likes his sunbae Soo-kyeong, but she doesn't like him back. One day he discovers 3-Minute Partners and passionately has Soo-kyeong as his partner. As he changes, will he be able to succeed in winning Soo-kyeong's love?
