A college student in 1999 discovers a mysterious ham radio that connects him to a woman from 2022, sparking an impossible love story across time.
| Actor | Role |
|---|---|
 Yeo Jin-gooYong | Yong |
 Cho Yi-hyunMu-nee | Mu-nee |
 Kim Hye-yoonHan-sol | Han-sol |
 Na In-wooYoung-ji | Young-ji |
 Bae In-hyukEun-seong | Eun-seong |
 Roh Jae-wonGeun-tae | Geun-tae |
 Nam Min-wooNam-hae | Nam-hae |
 Lim Yu-binSeon-joo | Seon-joo |
 Yoo Jae-myungSupervisor | Supervisor |
 Park Ha-seonProfessor of Sociology | Professor of Sociology |
 Shin Joo-hyupMan-soo | Man-soo |
 Yeo Joo-haYoo-jin | Yoo-jin |
| SSong Woo-rimStudent | Student |