It’s official - I.O.I is making their long-awaited return in May with a brand-new album, and nostalgia levels are through the roof For longtime K-pop fans, I.O.I represents a golden era of survival-show success and instant cultural impact. Their reunion alone feels historic - but a full album? That’s next-level. Will the sound lean nostalgic? Modernized? Experimental? Whatever they deliver, expectations are sky high.