On February 19, 2025, Liz Entertainment introduced their then-upcoming girl group M. prism by opening their official Instagram account. They announced that the group would be debuting in March via their Instagram stories.
On the same day, they released an audio teaser. On February 21, it was announced that M. prism would debut in March with their first digital single (mislabeled as an EP) "Knock Down".
The group also opened their other SNS accounts. On February 24, fans identified the members of M. prism as idols from other Liz Entertainment girl groups from a group photo released through a new article.
On the same day, Miku was officially introduced as member of the group, followed by Windy on February 25, Naye on February 26, Abin on February 27, and Kyrin on February 28. On March 2, 2025, it was revealed through their MV teaser that "Knock Down" would be released on March 28. On June 21, it was announced that Naye would be going on hiatus for personal reasons.
Later that month, she was unfollowed by the group’s official Instagram account and her story highlights were removed, effectively confirming her departure from the group. On January 15, Liz Entertainment announced that Abin had departed from both the group and the company following the expiration of her contract. It was also stated that she would continue her activities as an individual creator.
On April 7, 2026, Liz Entertainment officially revealed Sera as the newest member of the group. Previously, on October 12, 2025, she had performed with the group as a trainee to replace former member Naye.
Members
Discography
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