On the January 13 episode of 'Knowing Brothers', Hong Suk Chun revealed three things he promised to do when his first love left him.

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During the Q&A session, the cast of the show tried to guess the three things Hong Suk Chun promised when his first love left him. They took many different and outrageous guesses but eventually came to the right ones.

Hong Suk Chun said, "I promised my first love that I'll be successful as a celebrity, then buy a car for the person, and buy an apartment as well only if the person came back to me." Upon hearing this, the cast couldn't help but ask if the Hong Suk Chun's first love eventually returned to him. He answered, "No, the person told me to stop being so clingy and left."