Infinite F recently debuted in Japan as Infinite’s latest sub-unit group with “Heartthrob (My Heart is Beating)”. Now they have revealed the Korean version of the music video and will be making their debut as the sub-unit on music shows next week. Known for their youthful image, Myungsoo, Sungyeol, and Sungjong creates Infinite F. The group released the track “Heartthrob”…