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Not to be confused with TO.1.

Together as One! Hello, we are TO1!


TO1 (티오원), formerly known as TOO (티오오), is an eight-member boy group formed through the survival show World Klass. Originally as 10, they officially debuted on April 1, 2020 with their first mini album Reason for Being : Benevolence.[2]


2019: World Klass[]

On June 25, 2019, Stone Music Entertainment and n.CH Entertainment announced that they would be launching a new boy group called TOO through a new global survival program to be aired on Mnet in September.[3] Their name is an acronym for "Ten Oriented Orchestra".[4]

On July 3, a teaser video was released, revealing the show's title to be World Klass.[5] The 20 trainees were introduced starting on July 10.[6] The show premiered on October 4.

On December 6, the top 10 winners were announced through the live finale.[7] Two days later, n.CH announced that Han Jun, who made it to the final lineup after placing third, would not be joining the group due to partaking in an unauthorized leave and disreputable scandal when he was a trainee. He was replaced by Jae Yun, who had the next highest number of votes on the show.[8]

2020: Debut with Reason for Being : Benevolence, Road to Kingdom, Running TOOgether[]

On February 20, 2020, TOO released an introduction film, revealing their debut date to be on March 18.[9] The first individual teaser was released on February 27, starting with member J.You.[10]

On March 5, Stone Music and n.CH announced that TOO's debut album promotions would be partially rescheduled.[11] A new schedule was posted on March 9 revealing their debut had been delayed to April 1.[2] Their debut mini album, Reason for Being : Benevolence, was released on April 1 with "Magnolia" as the title track.

On March 20, Mnet confirmed the 7 boy groups participating in Road to Kingdom with TOO being one of them. The premiere date was then set to be on April 30.[12]

On April 11, the group announced their fandom would be called TOOGETHER.[1]

Road to Kingdom then officially began and was aired on April 30 with an online vote beforehand, from March 30 to April 5.[13] During the 90 seconds performances, they danced to "Into the dysTOOpia", which was a remixed version of "Magnolia" to introduce themself and ranked seventh.[14] During the first round, which was to perform a "king's melody", they had covered "Rising Sun" by TVXQ! and ranked fourth during the first round.[15][16] During the second round, which was to perform your own song, they performed "Magnolia".[17] They had ranked sixth during the second round, which was determined 30% by the contestants and 70% through votes of an online audience. The next round was a collaborative mission where the groups were randomly chosen to become a pair and prepare a performance together. In the end, TOO was partnered with VERIVERY and they both agreed to perform "On" by BTS where they ranked second out of 3 teams.[18] Overall, it was revealed that their cumulative score was fifth out of 6 teams, meaning they were at risk of eliminations. For the next round, their partners from the previous round had to choose a song for them to cover.[19] The song "Hard Carry" by GOT7 was chosen for them and so they visited GOT7 before a music show for advice on performing their own song.[20] Unfortunately, they had ranked last and was eliminated in the seventh episode.[21]

On June 12, TOO announced they would be making a comeback in July with their second mini album.[22] The album titled Running TOOgether was released on July 15 with "Count 1, 2" as the title track.

2021: Management dispute between CJ ENM and n.CH, name change, re-debut with Re:Born, Re:alize[]

On January 13, 2021, it was reported that CJ ENM had terminated their contract with n.CH Entertainment seven months after TOO's debut and ordered the agency to withdraw all management work for the group. Due to this, the release schedule for the group's third album was also delayed.[23] The following day, n.CH Entertainment issued a statement that details the dispute including not receiving the final management contract for months, that no formal contract was ever signed, unexpected changes to the contract terms, and not being paid for expenses since August 2020.[24]

On January 19, CJ ENM released a statement confirming that they terminated their contract with n.CH Entertainment after being unable to reach an agreement. CJ ENM will take full management over the group.[25]

On March 28, at their performance at KCON:TACT 3, TOO announced they changed their name to TO1 as well as dropping an "O" from their fandom name making it TOgether. All their SNS accounts have also been rebranded.[26]

On April 25, the group announced their first mini album under their new name, scheduled to release in May.[27] On May 4, it was confirmed that the album, titled Re:Born, would be released on May 20.[28]

On May 18, it was revealed that TO1 would be under CJ ENM's new music label, WAKEONE.[29]

On October 20, the group announced their second mini album, Re:alize, to be released on November 4.[30]

On December 28, WAKEONE announced that Woong Gi would be going on a hiatus due to his anxiety. The group will continue to promote as a nine-member group until his return.[31]

2022: Chi Hoon's departure, group hiatus, lineup changes, Why Not??, UP2U[]

On April 30, 2022, WAKEONE announced that Chi Hoon would be leaving the group and terminating his exclusive contract with the agency.[32]

On May 24, WAKEONE announced on TO1's official fan cafe that the group would be halting all scheduled activities including social media activities. They will use this time to reorganize the group, recharge and prepare for their next album.[33]

On June 17, WAKEONE announced that Min Su, Jerome, and Woong Gi had left the group and that three new members would be joining: Daigo, Renta, and Yeo Jeong. It was also revealed that TO1 would be making a comeback with a new album in July.[34] On July 8, TO1 announced their third mini album, Why Not??, to be released on July 28.[35]

On November 7, TO1 announced their fourth mini album, UP2U, to be released on November 23.[36]

2023: "Hug", Renta's departure, departure from WAKEONE[]

On March 4, 2023, TO1 announced their special single album, "Hug", to be released on March 9.[37]

On May 17, all nine members opened personal Instagram accounts.[38]

On September 22, member Renta announced through a post on his Instagram account containing a letter in both Korean and Japanese that he would be leaving TO1.[39]

On December 17, WAKEONE announced that all members decided not to renew their contracts with the agency. Their contracts will end on December 31.[40]


Name Position(s) Value Element Direction Color Years active
Dong Geon (동건) Main Vocalist Trust Earth Center      Yellow 2020–2023
Chan (찬) Main Dancer, Lead Rapper, Composer/Lyricist Courtesy Fire South      Red 2020–2023
Ji Su (지수) Lead Dancer, Sub Vocalist Number Water North      Black 2020–2023
Jae Yun (재윤) Leader,[41] Main Vocalist Justice Metal West      White 2020–2023
J.You (제이유) Main Rapper, Visual, Center Benevolence Wood East      Blue 2020–2023
Kyung Ho (경호) Main Dancer, Sub Vocalist Virtue Fire South      Red 2020–2023
Daigo (다이고) Lead Dancer, Sub Vocalist TBA Earth West      Yellow 2022–2023
Yeo Jeong (여정) Lead Vocalist, Maknae (2022–present)[34] Water North      Black 2022–2023
Chi Hoon (치훈) Main Rapper, Sub Vocalist, Composer/Lyricist Universal Love Wood East      Blue 2020–2022
Min Su (민수) Lead Dancer, Sub Vocalist Heart Earth Center      Yellow 2020–2022
Jerome (제롬) Lead Vocalist, Visual Life Metal West      White 2020–2022
Woong Gi (웅기) Sub Vocalist, Maknae (2020–2022) Wisdom Water North      Black 2020–2022
Renta (렌타) Lead Rapper, Lead Dancer N/A Wood South      Blue 2022–2023



Mini albums[]

Special single albums[]

Digital singles[]



  • "Almost Famous OST" ("Fly Away (비상)") (2020)
  • "Ghost Doctor OST Pt. 4" ("You Better Not") (2022)
  • "XX+XY OST" ("Balloon") (2022)
  • "Street Man Fighter OST Vol.2" ("Young Forever") (2022)
  • "Love Catcher in Bali OST Part.2" ("Overlap") (2022)
  • "The Haunted House Ghost Ball ZERO OST" ("Dream Touch") (2023)


Mini albums[]


Concerts participation[]

  • KCON 2022 LA (2022)
  • KCON 2022 US Tour (2022)
  • KCON 2022 Saudi Arabia (2022)[42]
  • KCON 2022 Japan (2022)[43]
  • KCON 2023 Thailand (canceled) (2023)[44]


Reality shows[]


  • Their previous greeting was: "To Be World Klass! Hello, we are TOO!".
  • Daigo and Renta are former contestants on Produce 101 Japan Season 2, finishing in 13th and 16th place, respectively.[34]


Main article: TO1/Gallery


  1. 1.0 1.1 TOO Official on Twitter (April 11, 2020 tweet) (former)
  2. 2.0 2.1 @too_offcl on Twitter (March 9, 2020)
  3. Soompi: Stone Music And n.CH Entertainment To Launch Boy Group Through New Mnet Survival Program
  4. Soompi: “World Klass” Announces Top 10 To Debut As New Boy Group TOO
  5. Soompi: Watch: Mnet Drops First Look At Upcoming Survival Reality Show “World Klass”
  6. Soompi: Mnet’s New Survival Program “World Klass” Introduces 1st Trainee Chan
  7. Soompi: New Boy Group TOO From Survival Show "World Klass" Announces Debut Details
  8. Soompi: n.CH Entertainment States Han Jun Will Not Join "World Klass' Group TOO + Jae Yun To Take His Place
  9. Soompi: New Boy Group TOO From Survival Show “World Klass” Announces Debut Details
  10. @too_offcl on Twitter (February 27, 2020 tweet)
  11. @too_offcl on Twitter (March 5, 2020)
  12. Soompi: Update: Mnet Confirms Lineup of 7 Boy Groups Who Will Compete In “Road To Kingdom” + Premiere Date
  13. Soompi: “Road To Kingdom” To Hold Online Vote Ahead Of Premiere
  14. Soompi: “Road To Kingdom” Has Begun: Check Out The 1st Episode’s Rankings, Rules For Eliminations And Advancing To “Kingdom,” Performances, And More
  15. Soompi: Watch: “Road To Kingdom” Contestants Kick Off 1st Round With Covers Of SHINee, SEVENTEEN, TVXQ, And More
  16. Soompi: Watch: “Road To Kingdom” Continues 1st Round And Announces Rankings + PENTAGON Tearfully Stages Last Performance Before Jinho’s Enlistment
  17. Soompi: Watch: ONF, Golden Child, ONEUS, VERIVERY, TOO, And The Boyz Stage Intense Performances For “Road To Kingdom” 2nd Round
  18. Soompi: Watch: “Road To Kingdom” Announces 1st Elimination, Reveals 2nd Round Rankings, And Begins Collaboration Mission
  19. Soompi: Watch: “Road To Kingdom” Contestants Cover BLACKPINK, GOT7, Sunmi, And More + Winner Of Collaboration Mission Revealed
  20. Soompi: Watch: GOT7 Gives TOO Advice For Their “Hard Carry” Cover On “Road To Kingdom”
  21. Soompi: Watch: “Road To Kingdom” Eliminates Another Group Before Finale + Teams Perform Covers Of MONSTA X, MAMAMOO, And VIXX
  22. Soompi: “Road To Kingdom” Group TOO Announces July Comeback
  23. (KR) Newsen: [단독]CJ ENM, 이번엔 갑질 논란…TOO 매니지먼트 분쟁
  24. Soompi: n.CH Entertainment Issues Statement Regarding Dispute With CJ ENM Over TOO’s Management
  25. Soompi: CJ ENM Issues Statement On Their Conflict With n.CH Entertainment Over TOO’s Management
  26. Soompi: TOO Changes Their Group Name To TO1
  27. TO1 on Twitter (April 25, 2021)
  28. TO1 on Twitter (May 4, 2021)
  29. (KR) MK: 티오원, ‘썬 오브 비스트’ MV 티저 공개...‘파워풀 퍼포먼스’
  30. Soompi: TO1 Confirms Comeback Date + Unveils 1st Teaser
  31. Allkpop: TO1's Woonggi to take a hiatus from promotions due to anxiety disorder
  32. Soompi: TO1’s Chi Hoon Leaves Group + Terminates Contract With His Agency
  33. Soompi: TO1 To Temporarily Halt All Activities
  34. 34.0 34.1 34.2 Soompi: TO1’s Agency Announces Group Will Make Comeback With 3 New Members + Min Su, Jerome, And Woong Gi Depart Group
  35. Soompi: TO1 Announces Date + Shares Teaser For 1st Comeback After Member Reorganization
  36. Soompi: TO1 Gears Up For November Comeback With 1st Teaser For “UP2U”
  37. Soompi: TO1 Announces Special Single Album “Hug” With Pretty Individual Teasers
  38. Soompi: All 9 TO1 Members Open Personal Instagram Accounts
  39. Soompi: TO1’s Renta Announces Departure From Group With Handwritten Letter To Fans
  40. Soompi: All TO1 Members To Part Ways With Agency WAKEONE
  41. V Live: TOO YOU from #TOO
  42. Soompi: KCON 2022 Saudi Arabia Announces Star-Studded Lineup
  43. (KR) YTN: 'KCON 2022 JAPAN' 2차 라인업…에이티즈·투바투 합류
  44. Soompi: TO1 Cancels KCON 2023 Thailand Appearance Due To Unforeseen Circumstances

Official links[]