Secret Number is a 5 member girl group under Vine Entertainment. Originally a 5 member group consisting of members Léa, Dita, Jinny, Soodam, and Denise, they made their debut on May 19th, 2020 with the single "Who Dis?" Two new members, Zuu and Minji were added in 2021. Denise went on a hiatus in 2021, and left the group in 2022. In 2025, almost all members except Soodam and Zuu left the group and the company. New members were added to the lineup, creating a 6 member group. Soodam left the group that year.
