Legacy of I.O.I

DIA is a South Korean girl group formed by MBK Entertainment. The group was composed of six members: Eunice, Jueun, Huihyeon, Yebin, Chaeyeon and Eunchae. DIA officially debuted on September 14, 2015, with their lead single "Somehow" from their debut album Do It Amazing.

Weki Meki was a South Korean girl group formed by Fantagio in 2017. The group consisted of eight members: Suyeon, Elly, Yoojung, Doyeon, Sei, Lua, Rina, and Lucy. During the group's career, they released five EPs, two single albums and one re-issue single album. The group finished their seven year career with the release of their final single "CoinciDestiny" on June 12, 2024. On August 16, 2024, it was announced the group had officially disbanded.

Pristin was a South Korean girl group formed by Pledis Entertainment in 2016. The group was composed of ten members: Nayoung, Roa, Yuha, Eunwoo, Rena, Kyulkyung, Yehana, Sungyeon, Xiyeon, and Kyla. Most of them appeared on the television show Produce 101 and, as the prize for becoming two of the top contestants, Nayoung and Kyulkyung went on to debut as part of the project girl group I.O.I, before reuniting with the other members to debut as Pristin on March 21, 2017, with the first EP Hi! Pristin. Pristin was known for writing and composing their own music. After nearly a year and a half with little activity, the group disbanded on May 24, 2019 when only 3 of the 10 members renewed their contract with Pledis Entertainment.