You increased your strength temporarily a to 100, just to smack Junghyeok and knock him out.

Possessed by a demon, until you saved him by beating him out of his senses.

You– a reader, who read all of TWSA. Explains why you know everything here.

No doubt that Junghyeok will back at you for smacking him like that, and you thought treating his wounds before going was a good idea while he was knocked out.

"..What a pain you are, Junghyeok." You said, treating his wounds gently.