J.Fla releases "Lines On My Heart," a tender retro-pop ballad of regret and quiet resolve. As though tearing a page from her diary, the South Korean singer/songwriter wraps a raw confession in ribbon-mic warmth—“the sound of midnight thoughts turning themselves into morning courage.” With over 17M YouTube fans and a bold new sonic chapter underway, this single sets the tone for her upcoming EP, arriving late summer 2025. Past press support: Flaunt Mag, Elle Mag, Grammy.com.