Legacy of SS501

Wanna One (Korean: 워너원) was a South Korean boy band formed by CJ E&M through the second season of Produce 101. The group was composed of eleven members: Kang Daniel, Park Ji-hoon, Lee Dae-hwi, Kim Jae-hwan, Ong Seong-wu, Park Woo-jin, Lai Kuan-lin, Yoon Ji-sung, Hwang Min-hyun, Bae Jin-young, and Ha Sung-woon. The group debuted on August 7, 2017, under Swing Entertainment and CJ E&M. Their contract ended on December 31, 2018, but their final activity as a group was their single album B-side released on January 27, 2022.

Spica was a South Korean girl group formed in 2012 under B2M Entertainment. The group consists of Kim Bo-a, Park Si-hyun, Park Na-rae, Yang Ji-won and Kim Bo-hyung. Their pre-debut single "Doggedly" was released on January 10, 2012, followed by their debut mini-album, Russian Roulette, on February 8, 2012. After five years of group activities, they officially disbanded on February 6, 2017, though Bohyung has confirmed a possible reunion in the future.