On May 11 episode of MBC's television show 'Radio Star', RAIN made a guest appearance.
During the talk, the hosts mentioned RAIN's famous work from the past―'Where Are You Going, Oppa'.
'Where Are You Going, Oppa' is a song made by RAIN featuring K-pop artist HyunA, released in February 2014.
It did not gain much attention back then, but a lot of people recently started listening to it again after it was discovered it contained uniquely-funny lyrics.
Even HyunA previously said about the song, "It's a song that my boyfriend DAWN listens to when he wants to laugh."
After that, RAIN sings, "Oh, why? I'm busy. Oh, why? I'm busy. Go play with each other, girls. I'm too busy. My name is Ji-, but RAIN on stage. Everybody falls in love with me within seconds. That's why I keep going back to perform. That's why I'm busy today." and it continues this way.
As soon as RAIN saw this, he burst out laughing and told her not to show it, blushing in embarrassment.
Ahn Young-mi sang HyunA's part, and RAIN sang, "Oh, why? I'm busy.", then stopped and laughed as if he could not sing it anymore.
He laughingly commented, "I actually forget how it went next as well."
RAIN answered, "In point of fact, my wife doesn't interfere in my work in any ways, so... Yeah..."
Kim Gu-ra responded, "Why don't you ask her about it tonight though? Maybe she doesn't know this 'Oppa, oppa' song."
RAIN said with a big smile, "Ah, okay. I might as well go and teach her the song tonight."