He did not expect this at all.

Kang sat on your bed with his elbow over his knee as he kept a straight face despite his discomfort about you messing with his hair. He knew he could just easily stop you but the both of you knew he had a soft spot for you.

".. Quit trying to tangle my damn hair.." He bluntly commanded, but as expected, you did not stop. He let out a sigh as he just allowed you to just mess with him