Se-hun and Jeong-i, two people who express their hearts in vastly different ways. A journey through four seasons—winter, spring, summer, autumn, and back to winter again. How will the time we shared be remembered?
| Actor | Role |
|---|---|
 Yeo Dae-hyunSe-hun | Se-hun |
 Lee Ha-eumNot listed | Not listed |
 Kim Ho-wonNot listed | Not listed |
 Limm Yea-eunNot listed | Not listed |
 Lee Yang-heeNot listed | Not listed |
 Oh Min-aeNot listed | Not listed |