K-pop idols who are BFFs for life, from BTS’ RM and Got7’s Jackson to Blackpink’s Rosé and Girl’s Day’s Hyeri – but how did they all meet?

IU called My Love From The Star actress Yoo In-na her muse at the 2017 Melon Music Awards, while Block B’s P.O and Winner’s Mino have been friends since they were high school classmates at Hanlim Multi Art School