On September 19, Yoo In Na and actor Kang Ha Neul held a book discussion live broadcast.

A few seconds later, IU picked up her phone and said, "Hello?"
When Yoo In Na heard IU's voice, she excitedly said, "Hi, IU!"
But instead of saying hi back, IU responded, "Who is this? I think you called the wrong number." and got ready to end the call.
Her response surprised Yoo In Na, making her eyes wide-open.
In order to stop IU from ending the call, Yoo In Na shouted, "Hold on, IU. Don't go! Wait!".

Yoo In Na burst into laughter and commented with an awkward smile on her face, "Yeah, she does things like this a lot. She's a real joker!"
She added, "She probably knows that I'm holding this live broadcast now, and just wants to make you guys laugh."
Then, Yoo In Na called IU again, and she did not hang up on her this time.
Yoo In Na and Kang Ha Neul spoke to IU for about 10 minutes and had a good laugh while doing so.
(Credit= 'YG STAGE' NAVER V LIVE, 'dlwlrma' Instagram)
(SBS Star)