On a live music radio show, a letter arrives from twenty-three years in the past. Through the letter, the first love and friendships of five friends are revealed.
| Genre | : Drama, Percintaan |
| Sutradara | : Lee Eun-hee |
| Pemeran | : 도경수, 김소현, Yeon Jun-seok, 이다윗, 주아름, 박해준 |
| Rilis Resmi | : 01 January 2016 |