"This was not supposed to happen, why it is happening is these a butterfly effect cause by my transmigration the original mc John supposed to beat the killer because the killer underestimating him but why was the killer so serious in these battle". The internal monologue of the transmigrated mc.
"Huh? What the hell doesn't he think that his fight from the killer earlier doesn't affect the storyline and now he is crying like a bitch because of the changes in the storyline he cause himself and asking himself how did it happen. Didn't he think that his fight earlier make the killer learned his lesson not to underestimate his enemies because of their age".
Haah! Another dumb protagonist who want the storyline to stay from the original timeline but can't comprehend that the meddling they did is the main reason for story deviating from original.