I Created Scientific Magic - Chapter 629 - 532 is ten thousand, ten thousand is one, it is everywhere, now I am everywhere too!

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.

There are always four kinds of people in the traditional Mary Sue world. The Male Lead, the Mary Sue female lead, the woman who never wanted to see the female protagonist live a good life, and the infatuated man willing to destroy heaven and earth to get the female lead.

Most people don't choose reincarnation.

Reincarnation finds their way to them.

Perhaps they did something great in their life.

Or maybe truck-sama wasn't looking where it was going.

But without fail, those who reincarnate are destined for something great.

A new life where everything changes for the better.

But...

Reincarnation isn't always the greatest thing.

Sometimes you just draw the short end of the stick.

Di Tou just happens to have drawn the shortest stick.

Pulled out of his life randomly.

Taken by a crazy old eccentric man not as a disciple, but as a body double?!

And a janitor body double no less?!

Grasping a system to find... It's a JANITOR SYSTEM!?

Truly, how unlucky can one get?

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Ein was a hitman on hire. A killer, a shadow, a death with insomnia, if you may.He had witnessed countless pairs of eyes dim as the light of life faded, leaving nothing but vile hollowness. Needless to say, the sight of a soul popping out of the dead body was a first.And it wasn't just any soul. It was the dead heir of Byers Holdings, the same guy he killed with his own hands. Turns out the rich boy Adriel had a horribly irritating and loud soul, but worst of it all - impossible to get rid of.Who would have thought that killing on a blue moon night could lead to being haunted?