'Nation MC' Yoo Jae Suk brought a smile with his unexpectedly cute phone case.

On August 9 KST, one netizen created a post on an online community forum titled,"What are these stickers on Yoo Jae Suk's phone?" The netizen then included some screenshots of Yoo Jae Suk from his appearance on a variety show. 

In the photos, Yoo Jae Suk was seated inside a car while holding his phone, but many noticed that he had a few 'Catch! Teenieping' cartoon stickers on the back of his phone. This came as unexpected and the netizen further wrote, "Did Na Eun [his daughter] stick them to his phone? TT Yoo-neu-nim (nickname that combines 'Yoo Jae Suk' and 'God') is so cute and sweet."

Some netizens commented:

"I guess it's an unspoken rule that you put stickers on your parents' phone when you're young lollll."

" It's from 'Catch! Teenieping' lollll. My younger sibling also loves that show."

"He put stickers of every color. So cute TT."

"Cutiee TT."

"Babies these days love that LOL."

" 'Catch! Teenieping' is a must these days."

"Ack LOL. He's making it obvious he's a baby father."

"I was surprised haha. My son also stuck the 'Catch! Teenieping' stickers on my phone too! I don't love it, but I can't bring myself to take it out."