MustB (머스트비) is a seven-member boy group under MustM Entertainment. They held their debut showcase on January 21, 2019 and released their first single "I Want U" on January 30.
Members
| Name | Position(s) | Color | |
|---|---|---|---|
| Sihoo (시후) | Lead vocalist, main dancer, maknae | Purple | |
| Taegeon (태건) | Main rapper | Blue | |
| Soohyun (수현) | Vocalist, lead rapper | Orange | |
| Sangwoo (상우) | Leader, rapper, vocalist | Red | |
| Doha (도하) | Main vocalist | Green | |
| Hawoon (하운) | Vocalist | Yellow | |
| Wooyeon (우연) | Lead vocalist | Indigo | |
| Pre-debut | |||
| Chibin (치빈) | Vocalist | ||
Discography
Digital singles
- "I Want U" (2019)
Trivia
- Taegeon was a former member of M.Crown and Challenger.
- Soohyun was a pre-debut member of LUCENTE under the name Xi.N.
- Sangwoo was a former member of PUREBOY, BLAST, Underdog, and Hi5 (the latter three under the name Kain).
- Doha was a former member of Underdog and Hi5 under the name Baekjin.
- Hawoon was a former member of Challenger and NewTownBoyz.
- Pre-debut member Chibin was a former member of MASC.