Sihu

On October 15, 2007, she debuted as a member of the girl group Sienna with the single album "Forget Me Not", under her real name Joohee. This was the group's only release as they presumably disbanded shortly after. On November 9, 2010, she debuted as a member of the project girl group J&B Dolls with their first digital single "Expect the Unexpected", under the name Sihu.

The group presumably disbanded sometime later in the same year.