Unforgettable

I will carry you forever.

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.

Doh Kyung-soo

Beom-sil

Kim So-hyun

Soo-ok

Yeon Jun-seok

San-dol

Lee Da-wit

Gae-deok

Joo Da-young

Gil-ja

Park Hae-jun

Min-ho

Kim Ji-ho

Gil-ja

Park Yong-woo

Hyung-joon

Park Yong-woo

Hyung-joon

Lee Dae-yeon

Su-ok's Father

Hwang Suk-jung

Gae-deok's Mother

Park Jeong-min

Yong-su

Lee Beom-soo

Young-chul

Hwang Young-hee

Bum-sil's Mother

Park Choong-seon

Bum-sil's Father

Kim Kwon

Young-il

Im Sung-jae

Sung-jae

Kim Hyun

Woman