Childhood sweethearts, the one-way secret love between Lin Huan, the younger brother next door, and Cheng Ying, the rotten girl sister.
They each went to college. It was not until the moment when his younger brother came back from serving in the army that Cheng Ying really discovered that the little kid who used to cling to his butt and cry had grown into a man with eight-pack abs. After that, the two of them always felt that it was very strange to get along, especially Cheng Ying. Maybe he can no longer be treated as a child, Cheng Ying thought secretly.
Intention: True love lasts forever!