- Country: South, South Korea
- Genres: Drama, Romance
- Release: 2016-02-24 (South Korea)
- Director: Eun-Hee Lee
- Writers: Eun-Hee Lee , Chang-Hoon Han
- Language: Korean
- Stars: Kyung-soo Do , Kim So-hyun , Joon-seok Yeon , Da-wit Lee , Da-Yeong Ju , Jang-Su Bae , Lee Beom-soo , Choong-seon Park , Dae-yeon Lee , Hae-Joon Park
- Runtime: 113 min
- Awards: 1 win
- AKA: Unforgettable (Singapore) , Unforgettable , Pure Love , Sun-jeong , Чистая любовь (Russian Federation) , Soonjung , Soonjung (Korea) , As Primeiras Histórias de Amor (Brazil) , 純情 (Japan) , Pure Love (Korea) , Unforgettable (Philippines) , Innocence (Korea) , Unforgettable (United States of America) , Unforgettable (United Kingdom)Innocence, sun-jeong, 恋上初夏 (Hong Kong), 纯情 (China), 순정
- Plot:
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.
- IMDB:tt5615904
Unforgettable Cast · · · ALL
Eun-Hee Lee
Director
Kyung-soo Do
Beom-sil
Kim So-hyun
Soo-ok
Yeon Jun-seok
San-dol
Da-wit Lee
Gae-deok
Da-Yeong Ju
Gil-ja
Hae-Joon Park
Min-ho
Ji-ho Kim
Gil-ja
Park Yong-woo
Hyung-joon
Dae-yeon Lee
Su-ok's Father
Seok-jeong Hwang
Gae-deok's Mother
Park Jeong-min
Yong-su
Lee Beom-soo
Young-chul
Hwang Young Hee
Bum-sil's Mother
Choong-seon Park
Bum-sil's Father
Kim Hyeon-I
Woman
Ga-hyun Yun
San-dol's Mother
Yeong-geol Yun
Auctioneer
Lim Chul-soo
Marine Products Young Man