- Protagonist: Xiao Muyu - cold on the outside and hot on the inside, art student, good at painting sunflowers. Birthday: October 16th (meaning "I want you all the way").
?
- The protagonist is: Ji Yungui - cheerful and sunny, with a mole on the lobe of his right ear. Birthday: June 21 (summer solstice, meaning "the warmest light in life"). Suffering from terminal illness (set as advanced glioma).
?
- Supporting role: Xie Zhixia - Ji Yungui's Fa Xiao, who knew about his illness, finally commemorated him.
?
- Supporting role: Xie Zhiyan - Xie Zhixia's elder brother, with a calm personality and a friend of the two.
?
- Supporting role: Li Ning - A classmate with a carefree personality.
?
- Supporting role: Yi Chuning - classmate, quiet and kind-hearted.
Concept: What I'm looking forward to is not the snow, but the winter with you