Cen Youwei has a secret: every time she dreams, she will meet a mysterious man covered in wind and snow, who will teach her to avoid all disasters in the future.
In reality, she met a gentle and pure junior classmate. The boy held a sincere heart and clumsily gave her the sweetest preference in the world.
Just when Cen Youwei decided to move towards real happiness, the man in the dream suddenly materialized and came to the world, shattering the boy's romantic confession with his own hands.
"Don't be deceived by him, he is me, but he has not experienced the pain of losing you, and he is not worthy of you at all."
It turns out that this is the fight and love of the same soul at different time anchors.
The boy will turn into a cold-blooded future obsessive, and the obsessive wants to regain the original sunshine across time and space. The sweetest oath has become a heart-breaking sword.
When the closed loop of the timeline closes, she must kill one with her own hands in order to let the other live.
