On January 13, Son Beom-su featured in MBC's television show 'Radio Star'.
During the show, Son Beom-su talked about his friendship with IU.
When asked what those calls were for, "IU asked me how to pronounce some words properly."
He continued, "Even junior announcers don't ask me those questions, but IU just wanted to make sure she was making proper pronunciations when singing and acting. She's so professional."
He laughingly resumed, "Ever since, she didn't call me often. I feel kind of bad, but there are enough information online nowadays, so..."
Then, Son Beom-su wrapped up the story by saying, "She does text me to say hello and ask me how I'm doing every now and then. She sends me holiday gifts as well."
(SBS Star)