HIGH4 20 Members Profile; HIGH4 20’s Facts & Ideal Types HIGH4 20 (하이포투엔티) was the sub-unit of kpop boy group HIGH4 under N.A.P. Entertainment, consisting of duo Alex and Youngjun. They debuted on October 3, 2016, with single ‘Hookga’. Following the main group’s disbandment on August 16, 2017, it is presumed that HIGH4 20 have disbanded as … Continue reading HIGH4 20 (HIGH4 Unit) Members Profile