DXD: Hard To Kill

"Nii-san, why are we here?" the little red-head whispered as he crawled through the vents

"Did you forget? Mom wanted us to get to know eachother." replied the older red-head

"I get that nii-san but, I mean why are we here" asked the younger crimsonette as he wasn't sure why he was in a vent following his brother

"How else are we going to have a brotherly bonding session besides going on an epic adventure. And in this case crawling through the vents of a corpus base" the shinigami replied as if it was the most obvious thing in the world

Their mother wanted the two to spend time together, so our protagonist decided to kill 2 birds with one stone. Drag his little brother off to another world when he gets summoned and do the request together. As the duo was tasked with saving a Tenno operative, they scoured the galaxy and chased their target from a sedna transport ship all the way to a Corpus research facility on Jupiter.

"Nii-san do we have to crawl throu-" He was cut off when his older sibling raised up a hand to stop him

"Shh.... do you hear that?" Shiro whispered as Millicas tried to focus on the sound

The sound of creaking metal rang out as the section of the vent they were in snapped off and crashed on the ground. As the two got up they found themselves surrounded by multiple corpus engineers and guards.

"Uh, would you believe us if we said we were fixing the A.C?" Shiro said as the two raised their hands trying not to make a scene

They all pointed their weapons at the siblings

"Well shit" Shiro said as his little brother face-palmed

∞

Alarms rang through the facility as explosions were heard. The source of the insanity came from a couple of crimsonettes as they fought their way through lasers and robots. As the duo continued to bust through the walls in search of their target, a mechanical shriek sounded out behind them as a specially modified red robot stepped forward.

"Alright Millicas, that is a Bursa. Very dangerous so be caref-" Shiro stopped when he couldn't find the figure of his younger sibling

"NII-SAN can I play with the dog!?" the shinigami turned his gaze back towards the bursa only to find it in a death hug from the younger red-head

"Uh, sure just don't go too far. I'll just go look for the tenno" the older red-head said blankly as he watched his little brother ride off ontop of the bursa as he threw balls of destruction everywhere

∞

Within a lab room, strapped onto an operating table was a feminine looking warframe. The tenno had no idea how long the torture would continue as the metal-heads kept prodding and experimenting on her. Even if she weren't strapped down she probobly wouldn't be able to get far considering how mentally and physically exhausted she was from being a lab rat.

The metal-heads in lab coats returned and they seemed to be in a rush. One of them wasted no time as it grabbed a mechanical laser saw, inching the blades closer to her mask. If astral bodies could cry she would be in tears.

Then the unthinkable happened. The wall exploded as the debris knocked the tin-head aside, saving her from the gruesome fate of having her face sawed off. She wasn't able to turn her head but she listened to the voice of her savior as he spoke towards the rest of the lab-coat wearing bastards.

"Oi assholes, you done goofed"

∞

Running through the corridor with the tenno in his arms. the silver-eyed shinigami was searching for his sibling before heading towards extraction. It wasn't really hard considering the kid left a literal trail of destruction in his wake as he road the bursa as his steed. He looked down towards the tenno to make sure she was still alive only to find that the mask seemed to be intensely staring at him.

"Uh, are you okay?" the shinigami asked unsure of being able to receive a response from the tortured victim or not

[Thank you] came a tired feminine voice in his head

"No problem, just relax and I'll get you out of here in no time as soon as I find my little bro" He said as he continued to follow the path of broken moa bodies

[System detects symptoms of hero worship and initial symptoms of yandere, caution is advised] came the robotic voice of the system

'What, how?! Hero worship I can sort of understand but why is she turning into a yandere?' questioned the shinigami

[Again system is unable to comprehend love, much less insane love. However Host's rank E+ luck may play a factor] stated the system

Shiro just cursed his rank E+ luck as he sped up to get the job done faster and head back to his world before the symptoms got worst

"Nii-san! Can I keep him?" Shiro stopped as he found Millicas still ontop of the bursa as they were surrounded by broken moa limbs and leftover pieces of corpus crewmen

"uh, ask mom" was his answer

∞

"And that's how I got him a dog. Don't worry you won't have to deal with potty training him" the crimsonette assured as he looked over to the Bursa with his younger sibling still riding ontop of it

Grayfia looked at the bursa to find what seemed to be oil or some type of fluid leaking underneath it.

"Uh, well you could get Ajuka to probobly fix it?" the shinigami nervously chuckled

On that day the Gremory Manor received a new pet