TOO (티오오) is the 10-member boy group formed through the survival show 'World Klass.' Managed by n.CH Entertainment with production and marketing by Stone Music Entertainment, they officially debuted on April 1, 2020 with their first mini album 'Reason for Being : Benevolence.'

Their name is an acronym for "Ten Oriented Orchestra." Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.