II Rina

The band presumably disbanded the same year due to inactivity. On November 20, 2015, she debuted as a member of the girl group UNIZ with the single album "Replay". The group became inactive and presumably disbanded in 2016.

In May 2016, she joined 4X after Hyoe's departure. She officially made her debut as a member of the group with the digital single "Secret Night" on July 25. She left the group sometime in 2017.

In 2020, she started working as a model and voice actress. On March 24, 2022, she made her comeback as a soloist with the digital single "Yammy". In June 2024, she participated in the live idol survival show Girls Frontier as a new member of the competing group Aka Ringo.

On September 9, she announced on her Instagram stories that she had graduated from the group. On August 27, she released the digital single "Free! ", under the new stage name II Rina.

On January 10, 2025, she debuted as a member of the self-produced girl group Hidden Glow with the digital single "Spotlight", which was produced, written, composed and arranged by herself. On March 20, Kiki announced on her Instagram stories that the group had decided to disband, citing physical and financial struggles caused by an overwhelming workload, along with internal conflicts among the members. The same day, I:Rina made a post on her Instagram account refuting the members' allegations against her and accused the members of cyberbullying her.

On June 26, she announced that she had signed with DB Entertainment and would be debuting as one half of the trot co-ed duo Daewang Mama, under the stage name Mama. The duo later made their debut with their first digital single "Blanket Of Love" on July 8.