Disclaimer: I own nothing, but my original characters!

#Raiding the Crow's Nest!

Raging crimson fire filled the world outside of my spherical barrier.

Although I didn't need the barrier because I had countless passive Nullification spells, I still put it on because the crimson flame would disturb my focus. Now, I was in the important part of my experiment.

"Issei, you bastaaaaaard! Return it! Return it back to me! I demand you to return it back, now, you little bastaaaaaaard!"

Amidst the roaring inferno, a bloodcurdling shriek filled with rage and madness echoed. As you expect, it was Ddraig.

So, why the Red Dragon suddenly attacked me with his trump card, the infamous Blazing Inferno of Scorching Flame? Well, I did take something import from him. So important that he lost all sense of reason when he discovered his important thing was missing.

[Ddraig, is very noisy. Issei, what's happening outside?] Inside her Fake Dimensional Gap apartment, Ophis contacted me via Telepathy spell I'd installed beforehand.

I installed that feature so I could contact Ophis at any moment. So far, I only used it to ask mundane thing towards Ophis, such as asking her if she wanted sweats or other convections.

As an aside, which was still related to the topic, Ophis had sweet teeth, and she became a glutton of convections. She could give a Kitty Rook of a certain redheaded devil run for her money.

Fortunately, Mr. and Mrs. Hyoudou had become rich after what I'd done in the past. So, we wouldn't have any problem even if Ophis increased our household's spendings.

In a related note, Mr. and Mrs. Hyoudou knew about Ophis. In fact, I had made them adopt her into our household officially. In their eyes, Ophis was like their spoiled daughter they doted on, a bit creepy daughter because of her lack of expression, but still doted by them nonetheless.

In yet another related note, Mrs. Hyoudou was currently in the third month of her pregnancy. In the canon, it's said she had a few miscarriages before she gave born to Issei. I asked Ophis to bless her and created magic to make her virile. And so, Mr. & Mrs. Hyoudou were waiting for their second child.

I did that because I felt bad after taking their son's place, and I was one hundred percent sure that I couldn't become a son who cared for them like the real Issei. I meant, I mindfucked them when I needed something from them.

Back to the story!

"Ah, Ddraig's pissed at me," I replied to her offhandedly. And what an understatement was that! Not only Ddraig used the 'flame that can burn gods to nothingness'. His flame was also imbued with his conceptual Penetrate spell. It showed how pissed-with-capital-P he was at me.

[Why?] asked Ophis, but I didn't immediately answer her question, opting to stop what I had been doing and turned my gaze towards Ddraig's position.

The Welsh Dragon had been raging for a half of day. And it seemed he finally realized the uselessness of his temper tantrum. Not even his strongest attack could damage me. It showed how outmatched he was.

"Well, I had changed Ddraig's sex permanently. So, he's she, now." As I casually answered Ophis's inquiry, the crimson flame dissipated, showing off the humanoid shape of Welsh Dragon.

Standing at 156cm and weighing around 45kg, she looked like a thirteen years old girl who just entered her puberty. Her hair was red like her scale and her horns jutted up from the spots above her pointed ears. She had a slender body with B-cup busts with perky pink nipple on each one of them, a slim and tight waist, round and supple buttocks, and a pair of healthy thighs. Her red eyes were teary-eyed as she glared at me scornfully. She was gnashing her teeth, baring her sharp canine openly for me to see.

Instead of looking intimidating, she looked pitiful.

Overall, she could pass as Elizabeth Bathory from Fate/Extra CCC with different hair color and shape of her horns.

...And she was naked.

The reason behind my decision to turn Ddraig into a girl was a whim. Since my puberty had kicked on, I started showing a sign of interest to the opposite sex. Nevertheless, I never thought Ddraig's female form would look like Elizabeth Bathory.

Still in a related note, at this point, I was almost fourteen years old. Speaking of school—what is school? Can I eat it? I'd stopped attending it.

"Well, just enjoy the experience of being the one Penetrated, instead of being the one who Penetrates other," I said to her in amusement.

"Your pun about my spell sucks!" She deadpanned to me. "I demand you to return back my masculinity... Please," said Ddraig pleadingly.

A part of me that was sadist felt elation from how low the mighty Red Dragon had fallen. What's more, I found her pitiful, distressed state was very cute. I really was a bad boy.

Before I could respond, I heard Ophis's confused voice.

[I, don't understand. Why Ddraig became frustrated over something trivial like gender?]

I snorted at that. Actually, I could understand Ddraig's frustration, but I decided to ignore that. It wasn't me who became a girl, after all.

"Why were you snorting, you bastard?!" asked Ddraig, enraged.

"Ophis said to me "Why you became frustrated over something trivial like gender?" You know, you should learn from Ophis. She didn't care about what gender she is."

The baleful glare Ddraig directed to me intensified in the blink of an eye. "Don't put me in the same place as Ophis. Ophis is a genderless shapeshifter! Since the beginning of their existence, Ophis doesn't have a gender! Meanwhile, I was hatched as a male dragon! I repeat! Return back my masculinity to me, or else..." she responded heatedly.

Even she said so, I still called Ophis with 'she'. But, I digress.

"...or else what?" I faintly smiled at her, taunting her to continue her threat.

"Raaaaargh!" Ddraig howled in frustration and she clutched her hair, trying to rip it out because of her rage. Her red tail that jutted out from her tailbone slammed the ground in agitation.

She knew her threat for me wouldn't work in the end. After all, I was a dimension away from her, power-wise. What's more, I kept growing, filling up my weakness with new spells I created.

"Fine!" She suddenly roared. "If you won't return me back to my proper gender, then so be it! I won't speak to you anymore until you changed me back! You hear me, I won't talk to you! Humph!"

As her last ditch attempt, she threatened me with something that a little girl would use when she was angered. I felt amused by her threat. What was she? A middle schooler? She was an ancient dragon, one of two heavenly dragons that made many pantheons wary of her. Yet, she threatened me like a sulking middle schooler.

She sat cross-legged on her spot, disregarding the charred floor around her, then crossed her slender arms under her modest breasts, and then threw her face away from me.

She did the whole routine 'sulking girl in her puberty' to a T, which made me speechless.

I wonder how long she can keep her 'no talk' strike on me. I mused in amusement before focusing back on my interrupted experiment.

###

I discovered in the third week after I'd turned Ddraig into a girl, her patience finally snapped. The reason why she snapped was her withdrawal from the lack of our weekly activity; harassing both Albion and Vali Lucifer.

At least, I had twenty days of peace without Ddraig's constant whining in my life. Because of that, I succeeded yet another one of my experiments. It was an experiment to visit another world based on the fictional story I knew of in my previous life.

I was ready to visit another world anytime, but Ddraig's sudden begging and groveling made me change my schedule for visiting other fiction based world. Well, I was quite curious about Vali's condition after two weeks of no harassment from a pushy Welsh Dragon.

When I checked him with my Scrying spell, I discovered the half-devil had become paranoid as fuck. He believed that I would pop out of nowhere and turned him into my personal punching bag worse than what I'd done so far.

How rude... Every time I visited him, it was because Ddraig forced me with her constant whining.

Oh, as an aside, Grigori really hated Ddraig's and my guts because of our constant visit to Grigori. In each visit, we had wrecked the Institute of the Watchers and dashed away without taking responsibility.

Azazel and Co. had tried to catch us, to no avail. Any trap they prepared was meaningless in the face of my OP Teleportation spell. I just punched a hole in any barrier they'd prepared beforehand. One could imagine their mounting frustration because of me and Ddraig.

The other factions were enjoying the misfortune of Grigori. Even Heaven and Ars Goetia. Although they had unofficial alliance under the table, they couldn't openly help out the Grigori for their dragon problem. They wouldn't mind if Grigori were erased from the world.

Then finally, Ddraig and I arrived in the forestry area near Grigori Institute. I had covered my appearance with Illusion spell, so my anonymity would be protected. Meanwhile, Ddraig was in her human form.

She was wearing a red tank top under her black leather biker jacket, a pair of faded grey jeans that the left part was cut mid-thigh fastened by a leather belt with studs and tribal dragon metal clasp, and a pair of high army boots. Her red hair was tied into twin tails.

She looked like a punk girl.

"Now! Let's began the royal beating of Albion! Come on, Issei! Let's go!" said Ddraig excitedly. However, I rooted on my spot. The Welsh Dragon's excitement faded when she saw me unmoving. "What's it? Why haven't you moved?"

"This time, why don't you fight yourself? You have a battle-able body, now. Try to have fun yourself. I don't have interest in fighting Vali and Albion in the first place."

Ddraig perked after hearing my words.

Usually, I was the one who fought in Ddraig's place. That was why the damage Grigori sustained in our raid was kept minimum.

When I fought, Ddraig cheered me in her mini dragon form as she floated around me while taunting Albion like nobody business. Since she had a battle-able body and not a cat-sized draconian body, and her partial Dragon Transformation looked like Scale Mail, albeit more organic, she could vent out her frustration and stress by herself.

"...but, I can only move one kilometer around you." Ddraig pointed out the important fact about her partial freedom.

Speaking of the limit of Ddraig's partial freedom, it had expanded to one kilometer after many experiments on my part. Unfortunately, I couldn't expand the range of her freedom more. In the end, one kilometer was nothing for mythical beings that could move with the speed of sound.

"Don't worry. I'll hide and maintain a suitable distance as you go nuts. How's it?"

"Fine! I'm going to fight myself! Anyway, it's been so long since I stretched my muscle and flexed my power!"

The moment Ddraig ended her declaration, her blood red aura exploded from her body. Her aura quickly condensed into the slimier and organic version of Welsh Dragon Scale Mail, albeit without the green jewels. A pair of leathery draconian wings that looked like the one Scale Mail had in Highschool DxD season 3 was spreading out from her back. She then rocketed towards the Grigori.

I shook my head at her impatience and quickly followed her. At the same time, I activated my Dimensional Shift spell that worked like Obito Uchiha's intangibility in Naruto. I only left my left hand in Underworld, so Ddraig wouldn't be pulled to my sub-dimensional base under Hyoudou's house. Finally, I hid my mirage and my left arm under the impenetrable invisible and powerful barrier spells.

[Albion, you dunderhead! Get the bloody hell out and fight me!] Ddraig roared loudly while changing her voice into deep, guttural version to hide her girlish voice.

As a side note, her English dialect and accent was very thick that one would mistake her as a UK citizen.

Vali appeared, already in his Vanishing Dragon Scale Mail. He wasn't alone. Grigori's Top Fighters were appearing one by one. At long last, several dozens of fallen angels with at the lowest in possession of four pair of wings were floating in front of Ddraig. What's more, I could see Team SlashDøg too.

They finally went all out. Too bad, their opponent was Welsh Dragon in her prime.

"Red Dragon Emperor! You have been harassing the Grigori in the past couple of years! The destruction you left in your wake was intolerable! No more! We won't leave you rampage unchecked anymore! Look! You're outmatched and outnumbered! Surrender or we will force you into submission! Or worse...we will kill you!"

The spokesperson was Azazel, and he looked like how the anime illustrated him, albeit he was more handsome than Brad Pit, somehow. In his hand, he was grasping a short golden spear.

Downfall Dragon Spear, a dragon-type Artificial Sacred Gear with Gigantis Dragon Fafnir's spirit sealed inside. It was Azazel's masterpiece after his Blazer-something sword.

So, our harassment in the past couple of year forced Azazel to complete that thing soon. I immediately realized what it was in the first glance.

Other than that, Ddraig's and my harassment towards Grigori also showed another positive change, namely Kokabiel. The Fallen Angel of Star seemed to be more active in Grigori, planning something to defeat, or apprehend, or kill us. So far, his plan always ended in failure, much to his frustration and my amusement.

[Hogwash! Cease your prattling and start fighting, you imbeciles! I'm very, very frustrated and in need of punching bags to release all my pent up frustration! Be honored every one of you lot will accompany Albion and his host as my punching bags! Boost!]

Ddraig responded with flexing her power. With a single chant of "Boost", I felt her physical strength, speed, reflex, endurance, magic and magic resistance were doubled and further doubled for 100 times. It was an absurd power boost.

Blood red aura filled the territory of Grigori. The density of Ddraig's aura was so high that it even crushed the buildings and landscape in 100km diameters, killing the weak Fallen Angels and non-Fallen Angel members of Grigori.

What Grigori faced now wasn't a mere Red Dragon Emperor the Possessor of Boosted Gear. She was the true Welsh Dragon in smaller and more agile form.

The nightmare of Grigori just started, and half of the fault was because they housed this era White Dragon Emperor. The other half was my fault because Red Dragon Emperor was no more after I changed her into a girl.

###

The one-against-many fight, if that could be called as one, ended in less than an hour.

With her formerly sealed power fully unleashed, Ddraig crushed all opponents in the all-out brawls against Grigori.

In the end, Grigori's damage was beyond measure. Grigori Institute had become a deep crater because Ddraig unleashed her true power at the beginning, and the weak members of Grigori had been turned into ashes at once.

Grigori's Top Fighters were dead. Only Vali and Lavinia survived Ddraig's brutal onslaught.

It was a shame the only female cadre and the most beautiful female fallen Angel, Penemue, died, having her head smashed into a pulp by Ddraig's knuckle. The female cadre had tried to block it with a defensive magic circle, but Ddraig's Penetrate spell rendered the circle useless. But, I'm going to resurrect her later.

Speaking of Vali, he had fainted. If I guessed correctly, Ddraig spared him so he'd give her challenge later. From today massacre, he would nurse a deep hatred for Red Dragon Emperor/Empress. Very ironic since in Highschool DxD season 2 Vali threatened to murder Issei's precious people, so Issei could nurse hatred to become strong. Yet, it happened to him here.

Since Grigori's central command and leaders were dead, Fallen Angel as the whole was going to be degraded down from a high-level supernatural faction to low-class.

I sighed when I looked at the destruction Ddraig had created. When I visited Grigori in the past, I would show restraint. But, I guess, Ddraig didn't know the meaning of restraint. Well, that wasn't my problem. If Fallen Angel faction was crushed, I wouldn't lose a wink in my slip. I had got what I wanted from them.

Currently, I was carrying my prizes from this excursion.

In my right hand, I was holding a horned black puppy that looked like Poochyena from Pokémon, the avatar of Canis Lykaon. I had separated Jin from the fainted Tobio Ikuse, ultimately killing him. I wanted to present Canis Lykaon as a birthday gift for my little sister's first birthday in the near future.

Team SlashDøg had fought bravely, but full powered Ddraig with my subtle support was just that OP! Furthermore, in Great War, three factions needed to be allied when facing Heavenly Dragons. Grigori was badly outmatched in this fight.

I was also carrying the unconscious Lavinia Reni on my left shoulder. Since she fought as a long range fighter, she wasn't physically harmed by Ddraig. She fainted when the avatar of Absolute Demise was crushed by Ddraig.

I am going to modify her memory later. I decided. What's more, she was a beautiful girl with a voluptuous body suited to be a sex icon. I had a plan to raise and train her as my loyal slave.

Overall, it was a beneficial excursion. After that, I returned back home with the oddly silent Ddraig.