BOYNEXTDOOR's first appearance as a whole! A royalty battle with Jonathan from the start?!

The K-Star Next Door – Season 4

Leader JAEHYUN and TAESAN turn out to have sticky fingers? Prince RIWOO's unique history! Mature LEEHAN for ONEDOOR who loves maturity! 19-year-old WOONHAK going through adolescence? How did SUNGHO become a loyal guy when they were trainees? BOYNEXTDOOR performs their new song 'Nice Guy' live~