Actor Song Joong Ki displays yet again his affection towards his precious best friend Kwang Soo.

In a photo which seems to be taken from his filming for "Descendants of the Sun", the actor is photographed from a far writing something on a piece of stone.

Upon a closer look, the words are read "Joongki ♥ KwangSoo (Asia Prince). 2015. 10.14." The actor melts netizens with his affectionate gesture towards Kwangsoo. It's heartwarming to imagine that Joongki even thinks about his friend wherever he is.

God bless their beautiful friendship!