A Man Who Went to Mars

Little Seung Jae stays up all night and writes letters to So Hui, pretending to be her father on Mars. Leaving Seung Jae's innocent heart behind, So Hui leaves for a big city. Both grew up to be adults; Seung Jae is a postman who writes letters to So Hui's grandma - the letters that never came from So Hui. So Hui's heart hardens after hardships in life, and she comes back to her hometown, and Seung Jae's heart swells up at seeing her again.