Jo Woochan, Park Hyunjin and Achillo finally release their full music video for the track “OGZ”. They state, Elementary school students have decided to do something ambitious! 13-year-old rap geniuses, Jo Woochan, Park Hyunjin and Achillo have teamed up for the ‘OG SCHOOL PROJECT.’ These boys who have skipped learning to walk and started to run first have started with…