On the third installment of Girl's Day member/actress Hyeri's YouTube channel, Hyeri's Club, SHINee's Key appeared as the show's first male guest. Hye Ri and Key had previously showcased their sibling chemistry while working together on the show 'Amazing Saturday - Doremi Market'.

While chatting over cocktails, Hyeri asked Key, "Do you have anything that scares you or makes you anxious?". Key replied, "I do. I'm terrified of losing my sense of self-efficacy. I'm afraid that I'll feel like I've become useless, and it's scary to think that the moment might come when I ask myself, 'Am I worthless?'. It's okay to become less relevant. That happens. But while not everyone has to live like they're in their 20's, but I think you should have a purpose. I'm approaching the age where I have to worry about that. I'm already 34 years old."

He added, "In our line of work, it seems like the results should be good, and we have to prove ourselves. Otherwise, people will say we've 'failed.' If there's at least one person who supports you, then you can do it. But as you grow older, the fear of losing self-efficacy is quite daunting. It's scary to think that while living as a human, you may lose your self-efficacy. As you get older, you might have no friends, no loved ones, and that's a scary thought."

You can watch the full episode of 'Hyeri's Club' with guest Key, below.