SIWOO debuted as JM after gaining pre-debut exposure through I-LAND. In July 2024 he changed his stage name to SIWOO, a distinction important when searching older performance videos and credits. His musical role spans vocals and rap as the group moved toward more internationally oriented touring.

JUST B debuted June 30, 2021 under Bluedot Entertainment. The group’s work combines carefully structured dance, vocal and rap performance. SIWOO remains part of its six-member line-up, while the group’s international fan base is called ONLY B.

Not every variety-show performance or songwriting credit represents an independent solo debut. This page focuses on documented professional highlights and does not invent an individual solo discography.