![Unforgettable](https://image.tmdb.org/t/p/original//3IcUCzEY0koZg0A4FNLtz6UlJHs.jpg)
![Unforgettable](https://image.tmdb.org/t/p/w200//eodfOkG5zOtvcLkNVqzLoac8qYn.jpg)
Unforgettable
1 hour 53 minutes2016-02-24
7.9
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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.
Cast
![Doh Kyung-soo](https://image.tmdb.org/t/p/w200//qjeam8N9lJU6dXtNoJi4PLfEGmn.jpg)
Doh Kyung-soo
Beom-sil
![Kim So-hyun](https://image.tmdb.org/t/p/w200//sJJbyFp2mu6mZZhN6I0C10vvihW.jpg)
Kim So-hyun
Soo-ok
![Yeon Jun-seok](https://image.tmdb.org/t/p/w200//gINb8haYK1q1n0uOAdgzvmpudry.jpg)
Yeon Jun-seok
San-dol
![Lee Da-wit](https://image.tmdb.org/t/p/w200//qWGDFlr47d2AJLtJsOEmfmaC21l.jpg)
Lee Da-wit
Gae-deok
![Joo Ah-reum](https://image.tmdb.org/t/p/w200//tX9hQCRq6EBF7wGYEwqxsX61Th3.jpg)
Joo Ah-reum
Gil-ja
![Park Hae-jun](https://image.tmdb.org/t/p/w200//7JzUYfjmq6JUg8ePU0GuTJBJlkD.jpg)
Park Hae-jun
Min-ho
![Kim Ji-ho](https://image.tmdb.org/t/p/w200//mZdvgtfpaTmtDGu8o9KcXstjoWs.jpg)
Kim Ji-ho
Gil-ja
![Park Yong-woo](https://image.tmdb.org/t/p/w200//kT0n5LGzij0RNaYXBxg8hDpTR9Z.jpg)
Park Yong-woo
Hyung-joon
![Lee Dae-yeon](https://image.tmdb.org/t/p/w200//rHvaG1I6verQ3OLW4BsipciUP0o.jpg)
Lee Dae-yeon
Su-ok's Father
![Hwang Seok-jeong](https://image.tmdb.org/t/p/w200//MEhgvZBDS890lfCSeUwHxWL3Xh.jpg)
Hwang Seok-jeong
Gae-deok's Mother
![Park Jeong-min](https://image.tmdb.org/t/p/w200//4ulrJOpIwgCjYjEsq8zdBoRnDDy.jpg)
Park Jeong-min
Yong-su
![Lee Beom-soo](https://image.tmdb.org/t/p/w200//9CSDpnR1gjbulTQdusJMiGc59Ff.jpg)
Lee Beom-soo
Young-chul
![Hwang Young-hee](https://image.tmdb.org/t/p/w200//t6qR3LFv17ZsvlHPZUoODwtwxKa.jpg)
Hwang Young-hee
Bum-sil's Mother
![Park Choong-seon](https://image.tmdb.org/t/p/w200//qUdSr6IvaedxFQy4FmjdJ4K8VJq.jpg)
Park Choong-seon
Bum-sil's Father
![Kim Kwon](https://image.tmdb.org/t/p/w200//6ikXQq7EWBtf5lFTDu9D5BSB7uQ.jpg)
Kim Kwon
Young-il
![Im Sung-jae](https://image.tmdb.org/t/p/w200//ggrfTvymOhQNxTqR63KXajQ1GIT.jpg)
Im Sung-jae
Sung-jae
![Kim Hyun](https://image.tmdb.org/t/p/w200//2qwTcHubAIB7MKoshDqUS0Ifcnb.jpg)
Kim Hyun
Woman
![Yoon Ga-hyun](https://image.tmdb.org/t/p/w200//wd23Uwo6V5n0t4wzNBQPdA2fTB5.jpg)
Yoon Ga-hyun
San-dol's Mother
![Yun Yeong-keol](https://image.tmdb.org/t/p/w200//ooknKOjgXLEwZLxztJpANKVM3bB.jpg)
Yun Yeong-keol
Auctioneer
![Lim Cheol-soo](https://image.tmdb.org/t/p/w200//6KKNwe9iXNBFhiXcNdpFNEFYCUD.jpg)