Onlyoneof will visit Warsaw's Progresja as part of a world tour to promote their album Things I Can't Say Love.

Onlyoneof is a six-member boy band from South Korea. The group made its debut on 28 May 2019. Onlyoneof is known for its unique and experimental approach to music and concepts. The group's line-up has changed over time, but the latest line-up includes members KB, Rie, Yoojung, Junji, Mill and Nine.