How does Oh My Girl's Binnie know Song Joong Ki?

Girl groupOh My Girlhad a showcase for 'Liar Liar' release on March 28 and memberBinnierevealed that she actually has a past with current trendy actorSong Joong Kiof 'Descendants of the Sun.'

Binnie revealed,"There is someone I'm having a one-sighed crush on. It's someone a lot of people like, Song Joong Ki.  I originally was a child actress and appeared in 'Sungkyunkwan Scandal' for a minor role.  At the time, Song Joong Ki asked my name and my age during break and even prepared snacks for me.  At the time, I was touched by his caring heart.  I will diligently promote for Oh My Girl, so I hope that he will remember me."

Aw!  That's so sweet of him.