In the year 1999, a young woman leaves her quaint seaside house and returns to the city, leaving in the mailbox a card for the next owner, with instructions to forward any mail of hers to the new address. In the year 1997, a jaded young architect moves into the same house--and finds the letter. His reply, which he slips into the mailbox, finds its way to her, beginning a parallel-time love story separated by a span of two years.
Unfortunately the movie Il Mare is not yet available on HBO Max.
| Camera | Hong Kyung-pyo | Director of Photography |
| Writing | Yeoh Gee-na | Screenplay |
| Writing | Kim Eun-jeong | Screenplay |
| Directing | Lee Hyun-seung | Director |
| Sound | Kim Hyun-chul | Original Music Composer |
| Writing | Won Tae-yeon | Writer |
| Sound | Oh Won-chol | Sound Supervisor |
| Visual Effects | Kim Tae-hoon | Visual Effects Producer |
| Crew | Jung Doo-hong | Stunts |
| Costume & Make-Up | Lee Gyeong-ja | Makeup & Hair |
| Editing | Lee Eun-su | Editor |
| Production | Cho Min-hwan | Executive Producer |
| Writing | Kim Mi-yeong | Writer |
| Production | Lee Min-su | Producer |
| Art | Kim Ki-chul | Production Design |
