Overview
Little Seung-jae stays up all night and writes letters to So-hee, pretending to be her father in Mars. Leaving Seung-jae's innocent heart behind, So-hee leaves for a big city. Both grown up to be adults, Seung-jae is a postman who writes letters to So-hee's grandma - the letters that never came from So-hee. So-hee's heart hardens after hardships in life and she comes back to her hometown and Seung-jae's heart swells up again at seeing her again...
Cast
- Shin Ha-kyun as Seung-jae
- Kim Hee-seon as So-hee
- Park So-hyun as Sun-mi
- Kim Min-jun as Seong-ho
- Kim In-kwon as Ho-gul
- Park Sung-woong
- Lim Seung-dae
- Lee Jae-yong as Sueng-jae's Father
- Lee Geum-ju as Seung-jae's Mother
- Jo Deok-hyeon as So-hee's Father