The Demon King is an Idiot [BL] - Chapter 44: A complicated case

As monstrous invaders ravage the world, Ryzen Kael— a man shattered by a tragedy ten years ago— faces his final moments. But just as death closes in, a mysterious system awakens within him, offering a path beyond his limits.Now, with nothing left to lose, he steps into a dangerous journey of survival and power, defying fate and unlocking abilities beyond imagination. Follow his rise as he challenges destiny itself, carving his name into history!Author's other storiesThe Unrivaled Holder: Rise of the Dragon Monarch - 3rd Season Ongoing

Ye Fan accidentally obtained a billion crystal technology system, and since then, he has become out of control.

Android: You do n’t even have a mobile phone system. I want to make it impossible for you all!
Ye Fan: Sorry, I researched it out, it seems to be more powerful than yours!
BMW Benz: Our engines are famous all over the world!
Ye Fan: Sorry, I do n’t have an engine, I only have magnetic levitation, and the speed is only a few times that of yours. Do n’t worry, take your time!
…
Enemy: Is he still human?
Who can stop this!

- Description from Qidian

Protagonist travels between different anime worlds to right wrongs and uncover his reason for being along the way.

A goddess of another world who called herself Goddess Liliel gave a unique skill [Creation Magic] to the nameless protagonist who is going to be reincarnated into another world.

Although she had knowledge of Japan in her previous life, she couldn’t remember the specifics—-the girl who decided to call herself Chise, invented the [Seed of Magic] in order to increase her mana, and continued creating them with her increased mana.

The girl who obtained massive amounts of mana stopped aging, and eventually obtained perpetual youth.

The forever young loli cheat creation witch Chise brought her companion Tet, her golem daughter who can’t grow old, to become an adventurer, and traveled around various places in a different world with the safe land as a base that she personally created.