Jang Deok Cheol
Jang Deok Cheol (Hangul: 장덕철) is a South Korean vocal group consisting of members Jang Jung-hyeok, Kang Deok-in, and Im Cheol. While the group debuted in 2015, it did not achieve mainstream success until 2017, with the single, "Good Old Days". The single topped South Korean music charts at the beginning of 2018, drawing accusations that the group's label, Limez Entertainment, had manipulated chart rankings.