A native person from less technologically advanced world, suddenly get cheat system that only modern people knows: game system. manhua like nanomachine and similar like that. cheating men must die was close, but I prefer native people get that chest and not people who get isekaid.
IF anyone knows this: https://neatmanga.com/manga/nano-machine/ or this: https://mangadex.org/chapter/697909/9 (maybe) also i prefer sentient and intelligent cheat item.
Sorry but that doesn’t fill the criteria. It’s just same as modern person discover cheat, not someone who doesn’t know scientific terms and all complex understanding... nanomachine is one manga that has this concept.