Saitama's Way Into Other Worlds

Dragons huh?

I should choose fairy tale, I heard it was good, next one is fate stay night.
Fairy tale [Y][N]

I pressed yes, then things became blurry, as I popped in some forest

"Huh, a forest maybe I could find some mushrooms to cook, wait why is everything bigger?"

As I checked my self, 'I'm short...'
"Noooooo! If I'm this short, I'm gonna be like that green brat!!!"
Later
"It's a good thing I'm actually not short, but young!"

The forest was annoying and foggy, luckily I found a huge cave!

"This is a really big cave, I wonder why other creatures don't go here, and it's shiny too, with all these crystals"
"Who dares enter my cave?!"

The voice was so loud it shook the cave.

"Your shaking the cave, so be quit!"

Then a huge dragon appeared, with platinum scales, and slit-eyes like a dragon. Except the eyes were strange, it was a color like the stars at night.
"You dare qui-wait your the intruder?"
"Intruder? I was just walking in"
"So little brat, what's your name?"
"Saitama, yours?"
"Behamut, Dragon god of the cosmos"
"Cool"
"Aren't you supposed to be exited?"
"Why? I've met better, I think?"
"Hahaha, I haven't met a kid like you in ages!"
"I'm no youngling!!!! Just physically young!"
"Yes you are no matter what, I'm 8,800million years old"
I guess even if I'm 20, I'll still be a kid
"Fine, what are you doing here?"
"Sleeping"
"How long"
"2,000 years"
"Your one lazy dragon"
"Hahaha, I guess I am"
"Well, I'm sleepy so goodnight"
"Hey yo-great the brats asleep"

Behamut Later
Things were doing great with the brat, he's now at least 10years old, I have bonded with him and spending time with him I noticed the great mana in him.

Not spiritual energy that mages use, what the brat has is mana, something lost in the ages, unlike spiritual energy q, mana can truly do anything. As long as they have enough mana and I could tell he has loads of mana, so much I can't put it in values.

The mana in him was also pure, beyond top quality I could say, yet he had no skills to use it for.

'I should, teach him Dragon-God slayer magic, though problematic it will be worth it for a someone like him'
"Saitama"
"Huh,what?"
"Do you wish to learn magic"
"Hmm, I guess?"
"You guess! I'm about to teach you Seriously Powerful magic!"
"So?"
"So! You should feel Happy! Exited"
"Fine, Yayyyyy....."

'This brat!'
"Why you...ugh, never mind, so you wanna learn?"
"Yeah, yeah"
"Fine! But this is a serious time, I'm gonna teach you magic, so you must pay close attention"
"OK...?"

Saitama
Things with Behamut was fun, with all the magic things, though I never felt magic exhaustion like Behamut said I would, he theorized that I had so much mana it would take a lot to tire me, and that I regained it too fast.

I wonder how? I never practiced magic before......
Meh who cares? It's all benefits, like coupons and sales day.

Though I did learn alot about magic and some spells like Cosmic Dragon God roar, Cosmic Dragon God Punch, Blah Blah Kick, basically coating my normal things with 'cosmic' magic, and manipulation of reality and other things.

I wonder what is reality? Is it something in the air? Or maybe a way to get free stuff? Nah, I'm getting to offtrack.

After 2 years he left me here alone, what a Basterd right? Luckily the dragon teached me how to cook and things like that.

Later
These few 8 years I've slowly been drowning in boredom, so I'm gonna leave, after I pack up.

"Can't wait to leave this boring dump, I wonder what he would say?
probably, 'This is no dump! It's my throne room!' Heh Heh Heh, I do miss that lazy dragon, oh well I better move on"

As I was moving along the forest, wild animals scurried away as they knew I was in the top of the food chain, maybe because I ate that giant fish? What was it called again?......oh! A megaladon, I wonder if they can grow
any bigger, they lasted me and Behamut 2 days...
Behamut doesn't even need to eat..
"Wait, if he doesn't need to eat....Basterd!!!!!!!!"
(As he screamed you will never know why)