On the December 20 broadcast of MBC's 'Radio Star', Lee Juk, Zion.T, Park Won, and Lee Mon Sae�joined as the guest.�

During the show, Zion.T's habit of not replying to text messages came into the topic. Regarding this, Zion.T explained he decided to get rid of the bad habit.�Special MC of the day, DinDin, commented, "I've heard it's hard to reach him but recently, I texted him right away after getting his number and he replied immediately."

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On the other hand, Lee Juk talked about how he was upset with Zion.T for his lack of response. He explained the artists of 'Infinity Challenge Music Festival' including G-Dragon, IU, Zion.T, and more had a team dinner together around the time of the event. After having several drinks, Lee Juk asked Zion.T, "Why is it so hard to reach you?" and Zion.T promised to reply to Lee Juk and said, "I'm no longer like that."

The next morning, Lee Juk texted Zion.T and said, "You drank a lot last night. Are you alright?"�but never got a response. On the same day, Lee Juk went to the gym with Yoo Jae Suk and vented about how Zion.T is so hard to reach. Hearing this, Yoo Jae Suk said, "Really? But he's texting me right now."

To this, Zion.T explained, "It's not that I didn't reply on purpose. I just forgot and missed the timing to do so."