I am the World's Strongest, because I can read MANGA

Story:

The other world I reincarnated to, was a world that will enable you to use magic after reading a Grimoire. And the Grimoire’s contents areーーYou wouldn’t believe it, it’s「Manga」. This world’s people would take around one year to read one Grimoire(Manga) But for me, it is a「Manga」, that’s why it would not take an hour. Interpreting and understanding all kinds of Grimoires and the 6 year old me who became the World’s Strongest Master Mage, Welcomed brides that were also 6 years old, and started living a carefree life……!!