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. Details Casts Videos Galleries Posters Title Unforgettable Release Date 2016-02-24 Runtime 01 Hours 53 Minutes Genres Drama Romance Production Companies Little Big Pictures, Jupiter Film Production Countries South Korea Doh Kyung-soo... Beom-sil... Kim So-hyun... Soo-ok... Yeon Jun-seok... San-dol... Lee Da-wit... Gae-deok... Joo Ah-reum... Gil-ja... Park Hae-jun... Min-ho... Kim Ji-ho... Gil-ja... Park Yong-woo... Hyung-joon... Lee Dae-yeon... Su-ok's Father... Hwang Seok-jeong... 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... Yoon Ga-hyun... San-dol's Mother... Yun Yeong-keol... Auctioneer... Lim Cheol-soo... Marine Products Young Man... UNFORGETTABLE (2016) (Trailer) Original Size (2997x1686) Original Size (1296x730) Original Size (1280x720) Original Size (1432x2148) Original Size (1000x1500) Original Size (1956x2793) Original Size (2000x2856) Original Size (1000x1430) Original Size (2000x3000) Original Size (1432x2048) Original Size (536x770) Original Size (600x857) Original Size (1200x1800) Original Size (2000x3000)