Sean and Yibo are not only actors, but also singers. Sean and Yi Bo have unique voices, so it is very appropriate to choose them to sing "Boundless". Besides, they are also the stars of The Untamed, so they have mastered this song better than others.
Sean made his debut on the talent show Burning Boy. He was a singer when he debuted. In this program, Sean also covered many beautiful songs. Sean has also sung many singles since his debut, such as Ask the Teenager and Yu Nian.
Yibo is also a singer. He is a member of the UNIQ organization. When Yibo debuted, he debuted as a singer. Since the debut of Yibo, there have been many good songs, such as My Dream, Just Dance, Young People's Heart and so on. Yibo can not only sing, but also dance very well.