- Actor-Shared Background: Yukika and Coco are bilingual (Yukiki speaks Japanese/Korean and Coco speaks English/Korean) while Mint is trilingual (English, Korean and Thai).
- I Want You to Meet an Old Friend of Mine: Sori's real-life unit mate Coco plays an interviewer in the show.
- No Export for You: At first when it was announced that it would air in South Korea. Eventually, Amazon reached a deal with SBS that they would air it outside of South Korea.
- Playing Their Own Twin: The Adult Suah is also played by Lee Suji.
- Promoted Fanboy:
- Sori knew of THE iDOLM@STER franchise prior to auditioning for the drama, and even went so far as to sing "Yakusoku" while cosplaying during her initial audition song.
- Likewise, Yukika had heard of THE iDOLM@STER series prior to auditioning for the drama, and is a fan of Iori's portrayal in Idolmaster: Xenoglossia.
- What Could Have Been: Hana Byul was suppose to be part of the show's Real Girls Project, but was subbed by Jiseul Cha because of an injury the former had sustained.
Trivia / The IDOLM@STER.KR