If you've ever lost hours falling down a BLACKPINK dance practice rabbit hole, screamed along to a BTS song, or watched PSY break the internet, you owe a debt to a trio of performers who changed everything about Korean music more than three decades ago. Their name? Seo Taiji and Boys. And their story - from groundbreaking debut to shocking disbandment to the lingering question of a reunion - is essential knowledge for anyone who considers themselves a true K-pop fan.