As a pseudo-overbearing elder sister who can protect her family and country at the top and beat up gangsters at the bottom, Ding Yi must protect her cold-faced younger brother Wei Ran! But shouldn't we be grateful to be protected? Why is it that when you get to Ding Yi's place, you have to rush to cover up the younger brother? But nothing can beat Ding Yiyi: I do! Childhood sweethearts or whatever, someone has to make the first move, and that's Ding Yi!