After School's Lizzy appeared as a guest on the recent episode of SBS' "Strong Heart", where she charmed the set with her Pusan dialect and�bubbly nature. Lizzy also expressed her thanks toward Yoo Jae Suk, which�provoked Kang Ho Dong. Lizzy had written an intriguing message, 'Teacher Yoo Jae Suk, thank you', onto her bulletin board. She went on to share her story:

"I recently appeared on KBS' "Happy Together", and MC Yoo Jae Suk aided me a lot. He told me to relax and just be myself, and many people started to show interest in me after the show. I often think that the show saved me. The number of members in the fancafe rose as well. Thank you, teacher Yoo Jae Suk."

Upon hearing Lizzy showing gratitude towards his MC rival, Kang Ho Dong started to don a comical yet flaring expression. Lizzy continued to jokingly provoke Kang Ho Dong by calling him an ahjusshi (old man), while referring to Yoo Jae Suk as 'teacher'. She gave her reason for giving Kang Ho Dong this nickname:

"When I was an elementary schooler, Kang Ho Dong came to a supermarket event in Pusan as the host. The reason why I call him 'ahjusshi' is because I feel as if we are friends. If the nickname offended you, I apologize."