Lee Seung Jun, better known by his stage name J-US, is the leader, vocalist and dancer of the boy group ONF. On December 27, 2021, he enlisted as an active-duty soldier.
![ONF 2021 LIVE CONTACT :: CODE #1. [REVERSE] movie poster](https://cdn-proxy.trakio.app/t/p/w220_and_h330_face/4wjPi5x2igYJI9jrbE5QcJhSW8X.jpg)
![온앤오프(ONF) CONCERT [SPOTLIGHT] IN SEOUL NIGHT 2 movie poster](https://cdn-proxy.trakio.app/t/p/w220_and_h330_face/6DhiTgCYAg09SDRLGCktfByp6xD.jpg)
![온앤오프(ONF) CONCERT [SPOTLIGHT:THE HIDDEN SHADOW] NIGHT 2 movie poster](https://cdn-proxy.trakio.app/t/p/w220_and_h330_face/whume1STRxwi0EVBYU8ZMk669nG.jpg)
![온앤오프(ONF) CONCERT [SPOTLIGHT:THE HIDDEN SHADOW] NIGHT 1 movie poster](https://cdn-proxy.trakio.app/t/p/w220_and_h330_face/zyN3yVwFR1NoZGgxd77aZ4etce7.jpg)
![ONF [FOCUS ON AND OFF] tv show poster](https://cdn-proxy.trakio.app/t/p/w220_and_h330_face/Au7UBGXv8opgUV1V7lUzl4Bu2i2.jpg)