Actor Yoo Yeon Seok playfully called out his longtime friend Jo Jung Suk over his filming habits during Hospital Playlist, revealing that the actor sometimes memorized lines for the wrong shooting day.

On October 30, Yoo Yeon Seok appeared on Jo Jung Suk's YouTube channel, Channel Jo Jung Suk, where the two reunited and shared funny stories about their experiences working together.

During the conversation, Yoo Yeon Seok discussed his new drama The Perfect Lie, explaining that he enjoyed working on the project because the filming atmosphere was comfortable and fun.

Jo Jung Suk jokingly asked, "Is it more comfortable than Hospital Playlist?"

Without hesitation, Yoo Yeon Seok replied, "The Perfect Lie is more fun," making Jo Jung Suk react in surprise.

Jo Jung Suk jokingly warned him, "The others are watching," referring to their fellow Hospital Playlist cast members.

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Yoo Yeon Seok then explained that both filming experiences were enjoyable because he was working with people he knew well, allowing everyone to feel comfortable and naturally immersed in their roles.

However, the conversation became even funnier when Yoo Yeon Seok began teasing Jo Jung Suk about his preparation on set.

Speaking about his own filming routine, Yoo Yeon Seok said, "Unlike you, I know exactly what we're filming that day and make sure I've memorized my lines properly."

He then jokingly added, "Sometimes, you come to set having memorized the lines for a different day."

His unexpected comment made everyone laugh, while Jo Jung Suk immediately protested.

"Can you stop bringing that up? Jung Kyung Ho does the same thing. Seriously!" Jo Jung Suk responded, revealing that another Hospital Playlist co-star, Jung Kyung Ho, had also teased him about the same mistake.

Yoo Yeon Seok continued joking about his own professionalism, saying, "I stay focused, finish filming, and leave."

He later teased Jo Jung Suk again, telling him, "I wish you'd focus a little more on your acting."

Despite the playful remarks, the conversation showed the comfortable friendship between the two actors, who worked together on the popular medical drama Hospital Playlist.

Their natural chemistry and funny exchanges offered viewers another glimpse into the close relationship shared by the cast members, even after their time filming the series together.