I am a world's strongest, because I can read a MANGA ~I spend a willful life with my wives~ (Associated Names)

The world I reincarnated into was a world that enabled you to use magic after having read 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 a year to read a single Grimoire (Manga) While for me, it would not take an hour, as it…