HIGH4 (Korean: 하ì´í¬, stylized as HIGH4) is a South Korean pop quartet under N.A.P Entertainment. In 2014, the group debuted with the digital single ë´„ 사랑 벚꽃 ë§ê³ , 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 (Headache), as well as their two previous digital singles.... read more