An orphaned boy falls in love with and writes anonymous letters a to 30-year old woman because she reminds him of his mother.
| Editing | Kim Sang-bum | Editor |
| Writing | Lee Mu-yeong | Writer |
| Production | Lewis Taewan Kim | Co-Executive Producer |
| Production | Kim Mi-hee | Executive Producer |
| Production | Choi Yong-bae | Executive Producer |
| Writing | Park Chan-wook | Writer |
| Editing | Kim Jae-beom | Editor |
| Writing | Yoon Tae-yong | Writer |
| Sound | Jang Young-gyu | Music |
| Writing | Choi Dong-hoon | Writer |
| Directing | Yoon Tae-yong | Director |
| Sound | Dalpalan | Original Music Composer |
| Crew | Lee Yong-jun | Martial Arts Choreographer |
| Production | Kim Soon-ho | Executive Producer |
| Art | Joo Byung-do | Production Design |