They are strangers in two different places, and they only know each other because they know someone together. Friends become love rivals, and whether the relationship between brother and sister can be tested. From then on, a journey of love begins, which is full of pathos and ups and downs. From the university campus to the green military camp, from the cruel workplace to the isolation of the family, can the on-off lovers finally be together? Persian grass is actually red root vegetable, and red root vegetable is Persian grass!