When she was young, Xiao Mo Mo's favorite thing to do was to spend all day with her brother who was a few months older than her in the house next door. She felt that Liu Yu at that time was her Prince Charming. She remembered that her brother made a promise to her at that time, "Fat Mo Mo, we agreed that you will marry me when you grow up." Unfortunately, her brother moved away later, and she slowly forgot about it.
But when the little brother from back then has come back and Su Momo has grown up, the agreement between you and me is still not enough. However, there are too many love rivals, so the 'little brother' has to work hard!