Byul dedicated a song to her late father on the February 6th installment of 'Immortal Song'.

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Byul is usually seen as upbeat, especially as the wife of HaHa, but she showed a more serious, somber side on the Lunar New Year special of 'Immortal Song'. She decided to cover her late father's favorite track, "You to Me Again" by Byun Jin Sub. 

Before getting on stage, she said, "My dad was hospitalized soon after my debut. He really wanted to come to my first concert, but he couldn't. It's been 3 years since he passed. Now that I have my own family, people don't ask about my dad anymore."

Though Byul's performance definitely touched the audience, it was Sweet Sorrow who took the final win.