So who's gonna explain this chapter cause I'm confused too(⊙…⊙ )

Okay this is based on my personal perception, I'm sorry if I got this wrong

Yeon said he wanted to test Keith sincerity, so yeon hired a fake person to beat him up to see if Keith will be worried all over for yeon

So in short "hmm if I get beaten up is he gonna be actually worried about me"

Well that's a stupid thing to do. Thank you for clearing it up