Cen Ai, a simple, happy and nervous unmarried mother; Su Nuo, an independent, calm and reserved girl. Two good sisters who grew up together in an orphanage.
Two people who grew up together and love each other as sisters, live together, are happy and sad together; experience and grow together; is being together a habit or a love?
Cen Ai: I just want to be with you. With you by my side, I am not afraid of anything.
Sunuo: Wherever you are, there is heaven. You are everything to me.
If you never leave me, I will depend on you for life and death.