Plot: It's year 2066, and Seok flashes back to the moment he met his wife, Ae-bong.
Cast
Lee Kwang-sooJo-SukLee Kwang-soo was 31 in The Sound Of Your Heart - Season 1 - Reply 2016 (Episode 4).
Birthday: Sun, Jul 14 1985
Kim Dae-myungJo-JoonKim Dae-myung was 35 in The Sound Of Your Heart - Season 1 - Reply 2016 (Episode 4).
Birthday: Tue, Dec 16 1980
Jung So-minChoi Ae-BongJung So-min was 27 in The Sound Of Your Heart - Season 1 - Reply 2016 (Episode 4).
Birthday: Thu, Mar 16 1989
Kim Byeong-okJo Chul-WangKim Byeong-ok was 56 in The Sound Of Your Heart - Season 1 - Reply 2016 (Episode 4).
Birthday: Tue, Oct 11 1960
Kim Mi-kyeongKwon Jung-GwonKim Mi-kyeong was 53 in The Sound Of Your Heart - Season 1 - Reply 2016 (Episode 4).
Birthday: Mon, Oct 14 1963
Seo Woo-jinInterviewerSeo Woo-jin was 35 in The Sound Of Your Heart - Season 1 - Reply 2016 (Episode 4).
Birthday: Sun, Jan 11 1981
Kang Kyun-sungJang Nam-Chul | Kyun SungKang Kyun-sung was 35 in The Sound Of Your Heart - Season 1 - Reply 2016 (Episode 4).
Birthday: Sat, Apr 18 1981
Jung Yi-rangKim Yoon-jiJung Yi-rang was 36 in The Sound Of Your Heart - Season 1 - Reply 2016 (Episode 4).
Birthday: Wed, Nov 05 1980
Kim SookKim SookKim Sook was 41 in The Sound Of Your Heart - Season 1 - Reply 2016 (Episode 4).
Birthday: Sun, Jul 06 1975
Park Na-raeJo Suk's old friendPark Na-rae was 31 in The Sound Of Your Heart - Season 1 - Reply 2016 (Episode 4).
Birthday: Fri, Oct 25 1985
Seo Jung-joonJo Suk's classmateSeo Jung-joon was 28 in The Sound Of Your Heart - Season 1 - Reply 2016 (Episode 4).
Birthday: Thu, Aug 18 1988
Yoon Jin-yiJo Suk's old friendYoon Jin-yi was 26 in The Sound Of Your Heart - Season 1 - Reply 2016 (Episode 4).
Birthday: Fri, Jul 27 1990