I.O.I is back after 10 years.

I.O.I has now unveiled the second official MV teaser for their title track, ‘갑자기’ (Suddenly) from their 10th anniversary mini album, “I.O.I: LOOP”, which will be released on May 19.

I.O.I was formed through the Mnet survival show Produce 101, I.O.I debuted with 11 members on May 4, 2016, The group officially disbanded on January 29, 2017.

On March 9, 2026, the group created their new social media accounts and announced their comeback to celebrate their 10th anniversary, with out Mina and Kyulkyung.