Light Up My Day (One Piece x Solo Levelling Male OC)

Massacre

Why am I giving away so much of the story? Idk.

I landed a sloppy punch that slid off his face before getting knocked into a mountain.

"I will kill you!"

"You rodent. I'm omnipotent. You never stood a chance."

A bright beam engulfed the area. I struggled against unconsciousness before embracing it and falling to the ground...

-------------------------------------------

[Chance to enter High School DxD]

[5 seconds to decline]

[5]

[4]

[3]

[2]

[1]

[Teleporting to High School DxD]

What? Where am I? Wait. Oh shit, this is Kuoh... So I have two options, run into the mountains and find a way to return to One Piece or destroy the entire world and steal all of the Longinus. Yeah, time to get the ultimate fusion gear. I walked towards the school, where I ignored the curriculum and proceeded to watch Issei die. Though, something interesting is that Raynare glared at me, so I just ran off.

"Who are you?"

"So you found me."

We faced off on the roof as we began a staring contest.

"A no one."

"You watched Issei die, but you didn't flinch."

"I've killed before."

As I turned to walk away, I barely sensed and dodged an attack heading at me.

"You had a chance... And you threw it away anyways. [Hiraishin]!"

I hit her head before punching her stomach, causing her to spit out blood.

"[Kiten]!"

I summoned a lightning wolf that's eyes were red. It rushed at the speed of a bullet biting off one of Raynare's arms. Her scream pierced the heavens as blood spilled from the stump that used to be her arm.

"Damn it! Who are you!"

"Since you insist... I'm just a passing-through demon king. Now die. [60,000,000 Volt Jamboule]!"

A dragon started materializing out of white lightning as I began charging up my attack.

"[Shageki]."

It engulfed her as the volts began to fry her nerves. The screams could be heard through the earth. Heck, even deaf people listened heard it! It might've been a little too loud as Sirzechs appeared and pointed a gun at me. Idiot.

"What are you doing here."

That was more like a statement than a question.

"Nothing much. Just had to care of some who had fallen from grace-"

I dodged the bullet and quickly sidestepped a quick punch from him.

"[Boidbomu]."

I quickly created a void orb and blasted it toward Sirzechs. It exploded midway to create a massive explosion as my cover.

However, He erased the explosion before striking me again. Knowing I had no choice, I hit back. Our fists clashed before we both flew back and prepared a special move.

I prepared a [Boido Rasenshuriken] with a speed and power boost from Hiraishin. In contrast, he prepared his demonic bullets of destruction.

I shot off towards him while quickly sidestepping and dodging his bullets. He was also rushing towards me with an orb of pure destruction energy.

We clashed in the middle, with me slowly pushing him back. Then Rias arrived with her peerage, which turned into a whole mess.

I struck Asia before jumping around to dodge one of Sirzechs' orbs, and then I punched Kiba in the jaw, and I swear I saw a tooth drop out there.

However, Akeno hit me with lightning and Issei with his sacred gear.

"How aren't you damaged! You're a demon, and holy attacks should be extremely effective!"

"Mudada. Though I said I was a passing through demon lord... It doesn't mean I'm a demon!"

I punched Issei through the stomach before ripping out his sacred gear and embedding it in myself.

'Yo Ddraig can you give me some of your strength?'

'Sure. You're a much better host than that pervert.'

"2x boost!"

I felt a surge of strength as I began to beat every single one of their asses into the ground. Sirzechs was a bit of trouble to deal with, but x4 ended it immediately.

'Kid, you know all factions are gonna either want to recruit or kill you right?'

'Yep.'

'And you just angered the entire underworld?'

'Yep.'

'And somebody probably wants to be your killer so they can become "The one who killed the unkillable" or something.'

'Yep.'

'Can I look through your memories?'

'Allow the one I allow you to.'