There is a tradition in the ethnic Chinese group, 'Xibe' where if one is behind the other and his/her index finger is pointing to the sky, this is a vow to the heavens that for his entire life, he won't love anyone else but the person in front of him.

if you don't know who they are, the one sitting is jung yunho and the one pointing at the sky with his index finger is kim jaejoong.

now if you don't mind me, i am going to silently walk away, cry and leave this for you to stare at.