In Qingwu Middle School, Xie Huaishuang, who is gentle and polite in the eyes of outsiders, has a sharp tongue in front of her; and Su Muning, who has experienced family changes, is the only audience who can glimpse the truth and vulnerability under his perfect mask.
They once decided their future with a joke in a sunny classroom:
"You said if I were old, would you still comb my hair like this?"
"Of course."
"Of course" is the most sincere promise of a young man. Until Su Muning's world began to fade - her vision blurred, her hearing deteriorated, and eventually, her black hair turned into snow. When the verdict of "VKH syndrome" came down, they were shocked to realize that fate had already written the cruelest farewell in the gentlest tone.
When the romantic vision of "growing old together" is accelerated by a rare disease, how can they hold on to the remaining time of each other before the destined heavy snow falls?
