On February 12, 2017, she was revealed as a member of the group's first sub-unit LOONA 1/3, which debuted on March 7 with the mini album Love & Live. ViVi is the only LOONA member to not release a solo album prior to her inclusion in a sub-unit.
On April 5, ViVi was officially revealed as the fifth member of LOONA. Her solo single album, titled "ViVi", was released on April 17.
2018: Debut with LOONA
On August 20, 2018, LOONA debuted as a full twelve-member group with their first mini album + +.