so there's this one panel at tog where evan was training khun to master his lighthouse more, so he can be more reliable, and evan was like "climbing the tower with an Irregular is definitely a special event for an ordinary Regular. I can sure understand."

and khun answered him “Well, if that’s how you want to see it.” i think he says those words because he himself can't explain it properly how end up being this loyal to Bam even goes as far as climbing the tower with him despite the gap of their power. Bam didn't follow Bam just

for the thrill and being acquainted on an irregular that may change the tower sooner or later. I think he answered like that to evan because his own reason for staying with Bam was a lot more deeper. he even said it himself that if Bam disappeared its like end of the world.

and he said he's more than willing to give his life if ever Bam will die just to make him alive again. Bam is more like his lifeline and reason, a person who makes him feel more alive and Khun was a person who makes Bam realize what's wrong and right with some of his actions

in conclusion tog is a thrilling saga of khunbam being the best partners in tog with Rak who's a cute tsundere but like and loves his turtles so much oof stan khunbam stan the best trio in anime history