Hello again.
The picture shows human Tom walking through a forest while it's raining. The Story isn't happening in a specific season or episode.
Have fun.

So, Star Marco and Tom are hanging out together and just talking. Tom told the both of them the past few days thwt he would lose his powers on one day of the year.

For him, it's the 37th of June. For Marco and Star it would be the 7th July. And although Marco and Star are asking about the Reason Tom never tells them.

We all know Star, so she Convinces Marco to sneak into the Underworlds Castle and look for the Reason themself. This already happens on the 7th of July. (Tom loses his power at 21pm, reason not needed)

The Castle is in preperation for whatever Event is about to happen. At the same time Star and Marco manage to find a big book of the history of the Lucitors and the Kingdom. They return to earth, taking the book with them.

Tom and his father find out that the book is missing and Tom figueres out that Star did it. After that he argues with his father weither he teleports to Star and get the book back, before they find out the Secret, or he stays in the Castle. (Because it's already 20pm)

Tom goes anyway. In the meantime, Marco and Star search trough the pages of the book and find what they were looking for.

(A little Info here, I really advice you to read! Below follows the Story and therefore the completely plot of the whole story. That means IF i'm writing a completely One-Shot with dialogue and stuff, this will be a spoiler for you. If you like the story so far, you can request it now and I'll write it completely, better, and just greater to read. If you don't care and just want to continue reading this crappy summary then go ahead!)

Tom meets up with Star and Marco, who are really upset because Tom never tells them, that (here it comes) he is actually a human.

Tom is upset as well, now that they know the biggest secret of the Kingdom. Since Star and Marco don't want anything besides a good explanation, Tom needs to return to the underworld before his power fades.

To this Point the story can be continued in different ways. In my version, Toms Father comes to earth, after he found out that Star and Marco know the Secret, and tries to kill them.

While he is fighting them he explains the entire Story. (I write it down for you here: Tom gets borned as a human. Not half demon. His father and his mother are concerned about the future, when Tom becomes the King. A human could never be taken as a king of the underworld, so they turned him into a demon. Against Toms will. The process wasn't harmless nor painless, since they need to implant thousands of demon spirits into Toms body until he himself become one. (He has thousands of spirits inside himself, even in the series)  The night his parents brought Tom to the altar hidden in the forest, was indeed the 7th July. So every year on that day and time, he becomes human again and lose his power.

Toms Father doesn't want anyone to know, so noone can tell the underworld demons and make a shame of the Lucitors and the kingdom. Noone would appreciate Tom as a King and it would lead to chaos.)

Thats the Story of the Underworld Kingdom.

Hope you liked it and let me know what end you would make out of this!
You can write every opinion in the comments :)

And here a little extra information to the Book.
If  you want to write your own story about one of my AUs, it's not forbidden. My only condition would be that you tell me first, (so I can read it of course!) And maybe even mention me maybe.

See you next time!