On a live music radio show, a letter arrives from the 23 years in the past. Through the letter, the first love and friendships of five friends are revealed. | ||
| Title | : | Unforgettable |
| Original Title | : | 순정 |
| Release Date | : | February 24, 2016 |
| Runtime | : | |
| Genres | : | Drama, Romance |
| Production Co. | : | Jupiter Films, Little Big Pictures |
| Production Countries | : | South Korea |
| Director | : | Lee Eun-Hee |
| Writers | : | Lee Eun-Hee, Han Chang-Hoon |
| Casts | : | Kim So-hyun, Do Kyung-soo, Lee Da-wit, Joo Da-young, Yeon Jun-seok, Park Yong-woo, Park Hae-joon, Hwang Young-Hee |
