In 2014, after participating in the hunnan tv lantern festival gala live broadcast, (t/n : it was actually in 2014 but op mistakenly posted it as 2013) they were rushing to fly back to seoul that very night and because he's the maknae so he had to be seated in economy class. When he saw the little kid sitting beside him, his heart was probably overwhelmed with sweetness so he held the child, he kept patting her head and even fed her someting to eat.