TO1 (acronym for TOgether As 1; 티오원), formerly known as TOO (Ten Oriented Orchestra; 티오오) was a 9-member boygroup under WAKE ONE. They were formerly under Stone Music (for production and marketing) and n.CH (for management). The group was created through survival show World Klass broadcasted by Mnet in 2019 with Chihoon, Donggeon, Chan, Jisu, Minsu, Jaeyun, J.YOU, Kyungho, Jerome and Woonggi as final members.

Chihoon left the group in April 2022. Minsu, Jerome and Woonggi left the group in June 2022. Daigo, Renta and Yeojeong joined the group shortly after in June 2022. Renta left the group in September 2023. They disbanded on December 31, 2023 after all the members decided not to renew their contracts Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.