I recommend putting all system related and name of the characters in bold since reading them like this would be a bit difficult to see all and all it's a nice story

Prisma illya ??

Or even tony stark tech

Engineering right invent something simple that doesn't exist in teyvat reward is something like blueprints of futuristic tech like honkai impact or star rail.

Try not to imitate Chinese to English translation mon ami my brain hurts trying to understand what is going on to the story.

What??

Good ol Leo the traitor

This is confusing 😕 you just said you want to ensure that the story follow the original route yet derived from the original?? Isn't that just copying the story and pasting then removing the original name and putting your own character so it's a self insert then??

You thought it was 15000 but no it was Dio

If anything bad happens always blame olive pizza for being disgusting

This seems familiar there was a fanfiction similar to this one I remember that one turn krillin into Buddha weird transformation . Surely this one is not going to be like that?

100 yen what a stingy system, what can you buy with that a single candy?

You're racist.

Who is hokuto it's taiga

Modern Japanese actually, I guess they are similar to history and Japanese teaching class?? Not sure how mixed class work

I don't think tenten is an orphan.

What's with the weird xianxia way of speaking??

I thought freya only like bright and shiny soul

Rune magic with rune he can basically create magic weapon if he learned to forged.

Kurou and panties huh????