Actor Ji Sung sat down for a meal with the production crew after the completion of MBC's 'Kill Me, Heal Me' in which he plays a man with seven different personalities and talked about his experience.

When asked about improvising portions of the drama, Ji Sung said, "Ahn Yo Na and Perry Park were mostly ad-libbed," making everybody laugh probably as they remembered the crazy, hilarious antics of both comic relief characters.

"If writer Jin Su Wan provides the basic mold, my responsibility was to make it fun," he revealed. "I made everything. There were even a lot of ad-libs in the scene when Perry Park drinks alcohol at the end."

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Regarding the actual talent of ad-libbing, Ji Sung admitted, "I was an actor who could not ad-lib. When I saw actors who were good at it, I often thought, 'How do they do that?' Seeing as how I was focused on the characters, the ad-lib came naturally. I cheerfully ad-libbed the conversations in an accent to my heart's content."

Moving onto everyone's favorite character, the sassy teenager Ahn Yo Na, Ji Sung said, "The kiss scene between Ahn Yo Na and Oh Ri On (played by Park Seo Joon) was also ad-libbed. However, the person who first approached me and gave me a kiss was Park Seo Joon. In the broadcast, it looks like I did it first, but Park Seo Joon did it first. I don't think I was that surprised."

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