Yoo Seung Woo and Monsta X member Kihyun collaborate for a new cover! The two boys are going by Two You Brothers and they are known to be good friends already. Kihyun along with Jeongmin of Boyfriend constantly feature in Yoo Seung Woo’s music video and now, Kihyun collaborates with Yoo Seung Woo for a fun cover. The two vocalists…