In order to avoid family disputes, Su Muyan pretended to be a cute and harmless "bastard", but was forced by his extremely controlling parents to "date" Prince Jing, Shen Jinghan, who was rumored to be "frail and sick", with the intention of binding the royal family.
Shen Jinghan was always cautious and had long sensed the ambitions of the Su family. He originally wanted to expose Su Muyan's disguise through a "date", but was repeatedly disrupted by the other party's "prank operations" - deliberately buying sour candied hawsers to "feed" when visiting the temple fair, "accidentally" rowing the oar into his face when visiting the lake, and "accidentally stepping on" the hem of his clothes when admiring flowers and causing him to fall into the flowers.
After several confrontations, Shen Jinghan discovered that this seemingly soft-spoken young man had a resourcefulness that belied his age. And Su Muyan gradually figured out that this prudent prince's "frailty" was all a disguise. When conspiracy and temptation collide, the two go from being wary of each other to falling in love with each other, and a drama about intrigue and sweet pets begins.