Park Woo-cheol and Gu Xiao are childhood sweethearts from different countries, one from South Korea and the other from China. Gu Xiao immigrated to South Korea because of her parents' work. One is an arrogant young master, although he is the object of girls' infatuation, he only has eyes for his Xiaoxiao; Gu Xiao is a wealthy young lady, although she is cold, but kind; although she is aloof, she is not lacking in courtesy. They have similar personalities, they appreciate each other, they like each other but don't know how to express their feelings, what kind of brilliant sparks will they create?