High4 Members Profile: High4 Facts; High4 Ideal Type High4 (하이포) currently consists of three members: Alex, Myungho, and Youngjun. In February 2017, Sunggu announced he would be leaving the group. High4 debuted April 8, 2014 under N.A.P. Entertainment. On August 16, 2017, High4 officially disbanded. High4 Fandom Name: High5 High4 Official Fan Color: – High4 … Continue reading HIGH4 Members Profile