Jung Hayoon has officially kicked off her solo career with a debut stage on Mnet’s “M Countdown.”
The singer performed her digital single “I Guarantee” on the October 8 broadcast of the music show, marking the start of her solo debut day. She made her solo debut on October 8, 2026 with the digital single “I Guarantee.”
Hayoon (하윤) is a South Korean singer, actress, and model under Line Production. Before going solo, she was a member of the girl groups myB and BONUSbaby, making this debut a new chapter after her group years.
The performance marks her first official solo stage appearance, putting her center stage after years of group promotions. No official statement on follow-up promotions was available.
Watch her debut stage below and see how the former group member carries her first solo single.
