Hiten no Asuka ~Isekai no Shoujo ni Saikyou Takara-gu Ataeta Kekka~

[MangaDex]

 

[F0nF0n]

The manga can read over here.

https://comic-ragchew.jp/comics/asuka/

 

[SalvySaroj]

Looks decent, will try after at least 10 chapter release

 

[Encyclopedium]

Eh if I'm being honest it's a Lays potato chips level story. Reminds me of all the school fantasy battle manga around 2016.
Though, the MC isn't a douche or a murder hobo.
The prevalent theme is ecchi over all

If you're okay with that then this is your ready