Chloe, a female urologist, is an expert in revitalizing men's masculinity, hiding her identity as a daughter of a medical family. William, the president of a food delivery platform, "undercover" his own platform and accidentally entered her clinic while delivering food, being mistaken by Chloe for a patient with erectile dysfunction. Chloe contracts a marriage with William on the condition of free medical treatment to avoid her father's arranged blind date, unaware that the other party is the perfect son-in-law handpicked by her father. The two started living together, and Chloe enthusiastically provided William with a male health treatment. However, William had to constantly disguise himself in the face of his crush Chloe, hiding the fact that he was not sick in each "rejuvenation" treatment. The two of them were in a relaxed and sweet relationship with each other, but also constantly faced the risk of losing their vests.
