Im looking for a unique type of a novel where the mc somehow stumbles into something that shouldnt be possible. They find a way to abuse "bugs" in reality or use hidden loopholes in well known systems to become really op. TLDR: Ordinaryish mc finds loopholes in reality and abuses it for his own gain. No BL please.
Not a novel but a comic, “Dungeon Reset” just the thing where he abuses bugs but lacks the Shounen-esque energy.