DXD: Hard To Kill

"TRAINING BEGINS NOW!" said the crimson haired 14 year old as he sucker-punched the brown haired kid

"wha-" he tried to say as he got smacked towards the wall of the dojo

"You weren't ready" shaking his head as he slowly walked towards the incapacitated victim

These two were our protagonist Shiro and the protagonist of this world Issei Hyodo.

You may be wondering why am I here tortu- I mean training the main protagonist. Well it's quite simple I actually want to watch 'Oppai Dragon' when it comes out due to curiosity. So out of good will I have taken it upon myself to train the protagonist to make sure he becomes the 'Oppai Dragon'.

[System detects multiple fractures and broken bones] sounded the robotic voice

'Oh shit' Shiro thought as he eyed the non-moving form of the future harem king

"No pain no gain Issei, don't worry I'll heal you up good as new" he said but inside he thought

'Uh Skasa, by any chance do you have any healing spells you could teach me? Preferably one that works fast' he hoped as he didn't want to cripple his fellow teenager

'I know of one spell in regards to healing' sounded the female voice in his head

'Oh thank gods, let's just hope this training doesn't cause any trauma for the kid' he said as he wiped some sweat off his forehead

One healing session later

"Now then when I came to you I promised I would show you the path towards becoming a Harem King." He began his speech

"Eto... is fighting against you really necessary for that?" asked the nearly traumatized brunette

"But of course! how else will you protect your 'OPPAI' if you cannot even protect yourself!" he emphasized 'oppai' as it was some sort of trigger word for the brunette

"OHHH ANIKI, I PROMISE TO BECOME STRONG ENOUGH FOR THE OPPAI!" Issei exclaimed

"Call me sensei, now along with daily sparring. For the next three years you will follow this training regimen to the dot every single day." He paused for a deep breath

"100 PUSH UPS, 100 SIT UPS, 100 SQUATS AND 10 KM RUNNING EVERY SINGLE DAY! IF THIS DOESN'T TURN YOU INTO SAITAMA I DON'T KNOW WHAT WILL!" Shiro yelled with a serious face

"Uh, who's Saitama?" asked the protagonist

"Don't worry about it" Shiro waved off his question

"Now START RUNNING!" he yelled as he took out a paper fan out of nowhere

∞

As I went back into the house to wait for Issei to finish his 10 km run my sleeve gets tugged by something.

"Fridge empty" said the monotone voice of the gothic loli

"How I literally stocked up the fridge an hour ago" I deadpanned at the unfazed girl

This was Ophis the Ouroboros dragon. Apparently I can't actually run from her since according to her she can feel me as I am in her own words "infinite" like her. So I gave up trying to run and let her stay as my roommate. Having an all powerful dragon god as a roommate, I never thought I would be able to say that in my lifetime.

"Not enough" responded the mini dragon god

"Hold on a second" I sighed as I went to restock the fridge. I found out I can also spawn in plain grocery items like cabbages and frozen stuff

"Play Dynasty warriors?" asked the monotone girl

Yes over the years I have been slowly corrupting the dragon god into becoming a gamer. Why? well why not? I figure if i'm going to have a roommate it'd be nice if it was a fellow gamer. Although I have been having second thoughts on introducing the goth dragon towards more competitive games as I am a little afraid to think of what a raging dragon god would do in my home.

"Yah sure after I finish training Issei, did you max out Zhao Yun yet?" I asked as I finished restocking the fridge

"mm finished" her facial expression didn't change but there was a small undertone of pride in her voice instead of complete monotone.

"Well I'll join you tonight, I gotta go check up on Issei" I said as I jumped to the air

∞

Nearby a park laid a panting figure of Issei Hyodo as he was spread on the ground. Issei wasn't completely sure of being trained by Shiro when he first met him, but as he listened to him he knew that this man knew of the greatness of 'OPPAI'! And that counts for everything. So Shiro must have been telling the truth when he said he would turn him into a Harem king in 3 years.

"Not bad, you actually did this seriously" came the voice of Shiro as he dropped down from the sky

"I... 'pant' am always serious about OPPAI!" he tried to yell but was too exhausted to do it

Nodding his head "Yes I am amazed by your dedication" he said sagely

"Which is why I am also serious about turning you into the Harem king" he said as he took out a glass of liquid

"This is my special blend of a protein shake" He raised up dramatically

"Um sensei... why is it bubbling?" he asked as he eyed the menacing concoction

"Don't worry about it" he immediately dismissed his question

"Now I shall bestow to you some words of wisdom that I once read from another fanfic" I said as I tried to tense up the atmosphere with a bit of spiritual pressure

"The harem must be fed." I said holding back my laughter as I ripped off the line from A knight's Will

Issei was looked confused "What does that mea-"

He was cut off by "Don't worry about it, NOW DRINK IT ALL!" Shiro yelled as he started forcing the liquid down his throat while laughing maniacally