I.O.I is a South Korean girl group formed in 2016 through the survival show Produce 101. The group consisted of 11 members and was originally planned as a temporary project, which led to their disbandment in 2017. Despite their short period of activity, I.O.I achieved great success and had a major impact on the K-pop industry, especially influencing later project-based groups.

After disbanding, the members took different career paths and continued to find success in the entertainment industry. Some of them debuted again in new girl groups such as Weki Meki or gugudan, while others built successful solo careers as singers, actresses, or television personalities. Because of this, many of the members have remained active and well-known in the Korean entertainment scene.

In 2026, I.O.I is set to make a comeback after nearly nine years, marking their 10th anniversary. With new music and planned performances, their return has generated a lot of excitement. For many fans, this comeback is especially emotional, as it reunites the members after a long time while also showcasing how much they have grown since their original disbandment.