Xu Mumu lives up to his name. He speaks slowly, walks leisurely, eats carefully, and even reacts in a thousand times. This little girl, who had the idea of dying alone, met Wei Yinian, a grown man who spoke vigorously, walked fast, ate ravenously, and even kept his mind spinning. From then on, there was no peace in her peaceful life, and her wish to live alone was in jeopardy. And Wei Yinian, who is accustomed to being surrounded by flowers and dancing butterflies, faces unprecedented challenges to his male self-esteem, and his charm crisis is unfolding day by day. He wants to end someone's single era in an open battle, which declares Waterloo time and time again...