Choi Jaewon, an omega who enjoyed a free and carefree student life with alphas like rabbits. After giving in to his father's insistence, he returned to Korea only to discover that what awaited him was.... Marrying his childhood friend, Yang Junhee? Unlike when they were kids, Junhee becomes Jaewon's ideal guy, which leads to Jaewon ending up arranging a wedding all of a sudden. Junhee mentions that he made a promise to Jaewon, but Jaewon doesn't remember any of that.... A romantic and sexual comedy between the naive Jaewon, who is obsessed with Junhee, and Junhee, who pretends to be a soft and tender lamb just for Jaewon.