When did TXT debut exact date?

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Tags

1. #their
2. #upcoming
3. #mysterious
4. #teasers
5. #celebration
6. #group
7. #announced
8. #place
9. #weeks
10. #tomorrow
11. #debut
12. #entertainment
13. #february
14. #officially
15. #march
16. #confirmed
17. #together
18. #after