For just two chapters, the Novel is pretty good so far. However, if I were to critique it:
The backstory for revenge is very, very little. Sure, Roy was a bully to seb, but for what?
We need Roy's backstory. Rn he is just a 1d character that's just there for the plot. Why does he hate seb to such an extent for Seb to want to kill him? this is the biggest plot hole so far.
other than this, everything is fine apart from repetitive grammar here and there.
Good job, and keep continuing on!