The supporting character's harem is very normal - Chapter 290 Bastard! Don’t joke with me.

I was reincarnated into another world, and I’ve brought the Horadric Cube from Diablo II with me.
Being a knight is cool and all, but being a wizard is pretty neat as well.
So, which one will it be?

Choosing a college when your family is struggling can be difficult, but it isn’t supposed to be world ending. And the falling meteor is seriously limiting Matt’s options. Now in the aftermath, his home city is locked down by a mysterious dome, corporations are looking to monopolize a wealth of new untapped resources, and people are suddenly developing powers via a system that seems to have borderline sinister intentions. In the chaos, he decides to stick to what he knows: stay out of the spotlight, grind, and survive.Watch as Matt is dragged into a dark LITRPG set in the real world, where the price of failure is death, and the prize for winning is beyond his wildest dreams.

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 was「Manga」

Interpreting and understanding all kinds of Grimoires, 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……!!

Zane was just a working-class adult with a passion for one thing—Cursed Bloodline Online, the once-revolutionary game that had faded into obscurity. After six long years of grinding, he was finally on the verge of ascension—until everything changed.His bloodline suddenly reset.The world itself changed immediately after.And without warning, everyone between the ages of sixteen to thirty vanished—pulled into the game’s world.Now trapped in the Realm of Bloodlines, Zane finds himself different from the others. While most awaken standard paths to power, he inherits a hidden Bloodline Class—the Cursed Bloodline of the Vampire Progenitor, the same bloodline that mysteriously appeared on his account just moments before the transfer.Alone, hunted, and feared as one of the last of a forgotten, despised race, Zane must fight to survive. To grow stronger before the world turns on him. To uncover the secrets of his cursed identity. And to discover what force brought them all into this deadly game.Slowly but surely, he forgets himself from the past, overtaken by the life of the body he now inhabits and the mysteries that surround it, becoming the very thing that caused the gods to curse his race in the first place.