Deception(Mha x OC)

I suck at those poetic sounding descriptions, so here's a list of stuff this fic will be about.

While this is technically an OC(a set name, backstory, and quirk), I'm gonna aim to make it a reader insert by making the descriptions as neutral as possible. This will be a fem reader with she/her, but maybe ill make a gn and masc version(literally copy and paste of this but different pronouns and certain descriptions).
You're Hitoshi Shinso's sibling, and yes, this is also Erasermic(Yay!)
other ships included: Shinkami, Kiribaku, Momojirou, Shoji x Tokoyami(idk ship name), and maybe I'll add in some more as it goes.
Hopefully you read this🙏