NO:EL, whose real name is Jang Yong Jun, is the son of the late former lawmaker Jang Je Won. Before the news of his father's passing on April 1st KST, he shared a heartfelt handwritten letter on Instagram. In the letter, the 24-year-old rapper expressed his deep appreciation for his fans, acknowledging their support from small venues to his ultimate dream stage. He expressed his determination to perform on bigger stages and become an artist that his fans can be proud of. He also mentioned inviting back those who have distanced themselves, asking for their love once more as they are part of his youth. The letter ended with gratitude towards his fans and an announcement of his upcoming performance on May 31st.

Online reactions to the letter varied, with some expressing concern and sympathy. Some questioned if NO:EL was aware of his father's passing, while others extended their condolences, recognizing the deep care his father had for him. The late former lawmaker Jang Je Won, who served three terms in the National Assembly, was found deceased on March 31st. He had been facing scrutiny over a past sexual assault allegation. In a note he left behind, he expressed apologies to his family, omitting any reference to the accuser.

NO:EL gained prominence through his participation in Mnet's 'High School Rapper' and 'Show Me the Money 6' in 2017, although his career has been marked by controversies and legal issues. A cryptic Instagram post he made in December 2023 hinted at a possible link to his father's past controversies, generating speculation among his followers.