Problem Solver System (Multiverse Fic Mostly Animeverse But Maybe Others)

-Fanfic Idea Start-

So there's a Guy.

He's a pretty chill Guy who likes to help others on occasion.

"Why not? One good deed a day is enough."

"Though I wouldn't sacrifice my life for some stranger, so don't get it twisted."

Very nice!

So, this Guy dies.

"Wait what?"

Self-admittedly, the Guy likes to solve problems as well.

Self admittedly, he likes problems because he can get creative and use his self-admitted great creativity to solve them.

A lot of self-admitted stuff right there, right?

Now, a whimsical omnipotent being found this self-admitted trait to be quite humorous and curious!

So...

"Hey, kid! Heard you like to solve problems!"

"...Sort of?"

"Great! The multiverse is plagued with those! So I'd be glad if you took care of them! Here's a system. The Problem Solver System - A system that grants you problems and you grow stronger the more problems you solve. EXP, strength, skills, items, gold, glory, and much more! Of course, the more problems you solve, the stronger you get, and the stronger you get, the problems you have to solve are accordingly more complicated and harder to solve!"

"What if I don't want to solve a problem?"

"Well, there's a light penalty if you don't complete it at its designated time or fail it. Then, you will get a new problem to solve."

"Okay, doesn't sound too bad."

"However, with each problem you solve or fail to solve, when the next one arrives you are suddenly thrown into a different world with a different problem to solve!"

"Wait what?"

"Don't worry! You'll eventually return to the same Universes you had been to when a new problem arises. You might make tens or hundreds of travels to the same universe to solve problems! So don't worry! Your bonds aren't for naught... Unless you come back in 100 years that is."

So!

Our hero starts with the most mundane of problems to solve!

For example - Spending 30 minutes in total in the Jujutsu Kaisen Universe:

Gojo Satoru seemed to lock Itadori Yuuji in his room... And forgot to bring him a key.

Problem: Itadori Yuuji is locked in his room. He doesn't want to break anything since he's just enrolled in this Jujutsu School thing.

Problem Solver - This Guy.

"Hey... What's your name?" Yuuji asked, extremely curious at the sudden appearance of a teenager in his room.

'This whole Jujutsu thing is so cool!' He had a convenient excuse ready, it seems.

"Guy. And give me a second, reading through this manual real quick." Guy replied as he read through a manual - "How to pick a lock, for dummies."

He bought the manual from the shop in his system using his Starter Gold.

It was thirty minutes later - That he managed to pick the lock and open the door.

"Well, was lovely to meet ya." He waved at Yuuji, who tilted his head.

Only to blink and find that Guy was gone as if he had never been there before.

"Woah..."

What about that time he spent a few hours in the Solo Leveling World?

Problem - Sung Jinah is about to be killed by Orcs.

Problem Solver - This Guy.

Worth noting - His power level at this point would at best be a D-Rank Hunter.

As such.

"AHHHHHHHHHHHH!" He yelled out in a panic as he held the shaking and terrified figure of Sung Jinah.

He did his best to run away from the Orcs chasing him.

"OPPA THERE'S AN ORC IN FRONT OF US!" She yelled out

"KYAAAAAAAAAAAAAAAA!" That one came out of Guy.

Sometimes, even when he's stronger and more magically capable, he gets problems like this:

Like that one time, he was in the ReZero Universe for 15 minutes:

Problem - Roswaal L Mathers's bathtubs seem to have been mysteriously filled with mayonnaise.

Problem Solver - This Guy.

"Identify yourself! Intruder!" Ram growled.

Guy hummed, "Mayonnaise removal service... Apparently."

Eventually... Guy finds himself with some moderately difficult problems to solve!

Like - One of the last times he arrived in the High School DXD World.

Problem - Trihexa is trying to destroy the world.

Problem Solver - This Guy.

"...Are my stats good enough for this? Can I ask for a timeout?"

The problems don't get timeouts! Suck it up!

"Guy! Great timing! We've got a problem!" Issei cheered at the sight of his... Friend? Problem Solver?

"Yeah, I figured."

"Where have you been anyway?!"

"There was a problem with one universe where a dragon capable of destroying it was about to do so unless fed with a very specific type of meat. So I went out to hunt a space whale and fed him the fillet. Lazy piece of shit, not gonna lie. He could have just gone out and hunted it himself."

"Ah... I swear, the problems never end..." Guy grumbled.

Indeed they don't! The problems truly never end!

-Fanfic Idea End-

Truly, I have outdone myself with this idea!

Honestly sounds like a really fun idea.

Basically, if you don't get it.

The dude travels from world to world to solve problems from the most mundane, short-term problems that take a few minutes or even seconds. Up to problems that take - Days, Weeks, Months, and even Years.

The beauty of it is that eventually, after some time he returns to solve a new problem in a Universe he had already been in.

As for how the time works - it's up to you.

Maybe it was a year for Guy and for the world he returned to, only a few months or even mere days passed.

The likelihood of return is also random and up to you.

He may come back to a specific world 100 times. Or maybe just twice but those twice are long term, etc...

Now, how would relationships and connections work for that matter?

That's really up to you and the direction you want to take this fic.

You may keep MC long-term with a hard problem to solve in a specific world for a more intense or something arc.

And then return to goofy.

Or perma goofy.

Or never goofy.

Whatever ya want!

Honestly, this seems extremely tempting to write for me.

But my plate is full, unfortunately. But who knows? :P