Pre-debut: Revealing of the first three members The first member to be revealed is Heejin on September 26, 2016. She debuted with her single album
HeeJin with the title track "ViViD" on October 5. On October 28, Hyunjin was revealed to be the second member. She debuted with her solo album titled
HyunJin and the title track "Around You" on November 18. A duet between her and Heejin, titled "I'll Be There", was also released, along with a music video. The next member, Haseul, was revealed on December 8. She debuted through her single album of the same name
HaSeul with the title track "Let Me In", released on December 15. Another track titled "The Carol" was released as well, with the three revealed members Heejin, Hyunjin, and Haseul.
2017: Debut with Love & Live, ViVi solo album, and Love & Evil On March 12, 2017, The sub-unit made their first live appearance on
SBS's
Inkigayo, performing both "You and Me Together" and "Love&Live". A day later, on March 13, they officially debuted with the release of their extended play
Love & Live, featuring Heejin, Hyunjin, Haseul, and Vivi. On April 5, ViVi was officially revealed as the fifth member of
Loona. Then, she released a solo album named
ViVi with the title track "Everyday I Love You", featuring Haseul, on April 17. The sub-unit supposedly cost 4 million dollars to produce, with the music video for their title track being filmed in New Zealand and Hong Kong. A
reissue of their extended play
Love & Live, titled
Love & Evil was released on April 27 with the addition of two tracks and the new lead single "Sonatine". == Members ==