Godly Stay-Home Dad - Chapter 12: Zi Yan’s Dilemma

He lived from BC to the Middle Ages, from the Renaissance to the Industrial Revolution, and from Cyberpunk to the Interstellar Age. He has been a king and a prophet, a knight and a nobleman, a versatile artist, a genius inventor…
This is a four-thousand-year human epic——
“To us four thousand years from now:
“Is the world at peace? Is famine extinct? Can people touch the stars? How long is the human lifespan? How far is the boundary of the earth? Human…do you remember us?”
——Excavated from Earth Age Tenth Century BC, Solomon Prayer Book.

- Description from novelbuddy

In the year 2025, humans awakened with the ability to summon mighty beasts—capable of destroying terrains, breaking the laws of physics, and creating wonders limited only by one's imagination.But before these blessings came a curse.An alien face appeared from nowhere and threatened all life on the planet, leading to the greatest war in human history.In the aftermath, the human race and the alien race were forced into a shaky treaty that could be broken at any time.Years later, tests for summoning abilities began for the next generation. Those who awakened low-grade summoning would be thrown to the gutters, while those who awakened higher got to join great factions after graduating from the academy.Kairos Veyl, the blank, calculating student, pulled his hand from the massive crystal pillar and stared at the large beast before him.“This kid—he just got a LEGENDARY SUMMON.”A legendary summon? The greatest class of summoning. However, with this class came a risk one would have never guessed.

With just three sentences, you convinced the Paladin to spend five thousand Gold Coins for you.You truly are a master of the Undead who thoroughly understands human nature!…“Respected Master Amberser, after our review by the editors at 'Legendary Spells' Publishing, we regret to inform you that your paper 'Research on the Non-Humanoid Form Modification of Undead Creatures' is unsuitable for publication in our monthly magazine. We suggest that you submit your work to a magical academic journal with less stringent review requirements.”A burst of ghostly blue flame erupted from the tips of fingers, reducing the rejection letter.“Damn it! You bastards are purely discriminating against liches, discriminating against undead magic!!!”“Drop dead!”

The strongest Demon Lord dies, and reincarnates as a human. Not only that, he because of various incidents turns into the hero’s best friend.

Follow his journey as he tries to help the hero escape his fate, and on the sideline to conquer the continent while he’s at it.