In October 2017, Ryujin auditioned for survival reality show MIXNINE. Having passed the audition, she made to the number 1 ranking of girls' team until the final episode, but was eliminated when the boys' team won against the girls', and hence ultimately did not get to debut.
- The King (2017) - Jimin
- MIXNINE (JTBC, 2017–2018) - contestant
- Stray Kids (Mnet, 2017) - cameo
- BTS - Love Yourself Highlight Reel (2017)
|Yeji • Lia • Ryujin • Chaeryeong • Yuna|
|Tour||ITZY Premiere Showcase Tour 'ITZY? ITZY!' (2019)|
|Related topics||Sixteen (Chaeryeong) • Mix Nine (Ryujin) • The Fan (Yeji)|