In October 2017, Kuromiya officially withdrew from the group. The sudden announcement cited throat issues caused by a demanding performance schedule, but Kuromiya also voiced a deeper disillusionment with the idol system. She made it clear that she wanted to pursue authentic rock music without the commercial constraints and objectification inherent to the idol machinery.
Supervised promotional events where collectors buy multiple copies of media merchandise to secure brief interactions or strictly formatted polaroid photos with the talent. junior idol rei kuromiya work
In 2014, Rei Kuromiya participated in the Miss iD 2015 competition, where she won the equivalent of second place (準グランプリ), earning the title "Miss iD 2015". This placed her in the national spotlight as a winner alongside the grand prize recipient, Rie Kaneko (金子理江). The following year, in March 2015, Rei Kuromiya, Rie Kaneko, and cross-dressing performer Ladybeard (レディビアード) were brought together to form the eccentric idol-rock group LADYBABY (later renamed The Idol Formerly Known As LADYBABY). In October 2017, Kuromiya officially withdrew from the group