"Who am I?" This question has always been with Mu Yi. This girl who can't even forget her own name got lost on the way to school. She happened to witness a dispute between the gangsters and the knight. The knight escaped cleverly, but unintentionally caused trouble to Mu Yi. In order to apologize, the knight helped Mu Yi to rescue him and then escaped from the sight of the gangsters. From then on, a seed of love gradually sprouted in Mu Yi's heart. A few days after arriving at school, Mu Yi discovered that she was in the same school as the knight who saved her. With the help of his friend Juddy, he confessed his love to the knight. There are four princes on campus, and one of them is entangled with Mu Yi, which troubles Mu Yi. The boy with the angel face has helped Mu Yi in many ways. Facing Mu Yi's innocence, can he win the favor of the angel face? Is it the prince who can touch Mu Yi's heart, or is the knight willing to give up his current relationship for Mu Yi?