This is also not clearly explained in the novel but basically, Do-Jun relives his “HS Life” over and over again like a game restarts during his HS Life and he is trying to go against the “plot” but the world is not giving him clear answers. And now our MC or the “parrot” in Dojun eyes became a variable, the unpredictable variable in his never ending resetting life. But then technically, MC is like transported to the “novel” in which he is saying it to Dojun at chapter 61 or is it chap 60.
I don't think he relives it over and over again. It's just that when he tries to do something different from his past life, the world keeps it back on track (it's not an endless iteration, just one time thing)
Confused and lost with this plot?