DAY6 (데이식스) KOREAN DAY6 – days gone by (행복했던 날들이었다) 행복했던 날들이었다 haengbokhaetteon naldeurieotta “days gone by” [EP] Remember Us: Youth Part 2 2018.12.10 Jae, Sungjin, Young K, Wonpil, Dowoon…