On January 28, Park Bo Gum had a cafe interview in light of his recently ended drama. Regarding his co-star Song Hye Kyo, Park Bo Gum said, "When I first heard my partner is Song Hye Kyo, I felt like I could hear her voice while reading the script, so it was cool. Song Hye Kyo sunbaenim was just Cha Soo Hyun itself."
He added, "Song Hye Kyo sunbaenim took good care of me. She well depicted Cha Soo Hyun, and I was able to focus well on Kim Jin Hyuk." Park Bo Gum also shared he didn't feel the age gap.
Park Bo Gum is known to be close to Song Hye Kyo's husband, Song Joong Ki. He and Song Joong Ki are also labelmates. When asked about Song Joong Ki's reaction to 'Boyfriend,' Park Bo Gum emphasized his romance was with Cha Soo Hyun, not Song Hye Kyo and said, "I think sunbaenim is busy filming 'Asdal Chronicles' so he didn't have much feedback."