Related Information for High4 HIGH4 (Korean: 하이포, stylized as HIGH4) is a South Korean pop quartet under N.A.P Entertainment. In 2014, the group debuted with the digital single 봄 사랑 벚꽃 말고, featuring IU. The members include Sunggu (leader), Alex, Myunghan, and Youngjun.They released their debut mini-album on August 27, 2014 titled "HI HIGH" which featured the promotional song "뱅뱅뱅" (Headache), as well as their two previous digital singles... read more