O My Jewel (오마주) was a three-member girl group under Acoustic Company. They were multinational with members from South Korea, Russia, and China. They debuted on November 15, 2017 with their first single "Tambourine". Member Junghee left the group on December 18 due to health issues. On April 3, 2018 it was officially announced that the group had disbanded after only 5 months.