With soundless steps, M0 crossed the dark corridors of the building denominated as the central one in terms of military ranking. Supposedly, it was used to hold important discussions revolving around the high ranking seats of this base in particular, maybe even of the Japanese military world as a whole. His presence remained hidden in the shadows, for as many soldiers he crossed paths with on his way back to the building where they had been closed off inside - though only until he swept the key from inside of Kinjou’s pocket and unlocked the door -, none of them seemed to noticed he was passing by.

He was like a black cat in a dark alley – only if it opened its eyes would the mice lurking in the sewer notice the murderous intent in the midst of them. Observing them closely. Waiting for the right opportunity to enjoy its delicious meal.

And M0 knew he was being viewed in the exact same way as soon as he exited the building and his body came crashing against a wall of a nearby back alley, his back tightly pressed against the hard, cold surface at the strong impact of two bodies joining against one another.

“Stay away from humans, Rei!” growled M1, his eyes glowing red in the shadowy ambience of the alley. “I think I told you that just a couple of hours ago. And before you retort that they aren’t fully humans but a mixture of our own with their own, 50%, 60%, even 5% humans are included in that warning.”

“...” At hearing that final sentence, M0 immediately closed his mouth, swallowing the words that were about to mimic what M1 had just said. Face downcast, he allowed his body to relax once again with the lack of danger to his well being. “...I’m sorry.”

“Are you apologizing because you’re repenting over what you did or is that your way of telling me that you will not do as I say?” inquired M1, closely eyeing the other male. When he saw him twisting his nose just the slightest, he couldn’t help by release a soft exasperated sigh. “Of course you will not do as I say. Otherwise, you wouldn’t be you. But nevertheless... Stay away from humans, Rei. Or I’ll kill them.”

“Why would you need to go that far?” asked back M0, raising his head once again and staring deep into M1’s grey eyes, a serious expression on his face. “Would you kill Mitaru-kun or Atsumu-kun if they get too close to me? You wouldn’—“

“I would,” readily interrupted M1, giving a half step forward and pressing M0’s body more tightly against the wall through the means of his body. “Every single being in the world is expendable if it means keeping you beside me. Super soldier, human, a mixture of both... I would kill every single one of them squirming around this planet if it means keeping you safe and sound by my side. So yes, even though they are our own, I would kill Atsumu or Mitaru, Azuma or Tsugi if they cross the line.”

“...That’s...” started M0, a part of his being, deep inside of his chest, throbbing at hearing those words coming out of M1’s mouth. Slowly, he motioned his hands upwards, albeit with some difficulty due to their current positions, and gently cupped M1’s face. “Please don’t say something like that, Iru-kun... I don’t want to see you getting hurt...”

“There’s no way I would be defeated by anyone, even by them,” said M1, leaning over the soft touch on his face. “The only person that could make me lose is you, Rei. And I know for a fact that you would never do it, just as much as you know that I would never do the same to you. We’re both winners and that will forever remain as such. I know I'm absolutely right on what I say and you... Damn it...!”

“Ngh!” All of a sudden, M0’s body was pressed even more forcefully against the wall, his neck being tightly grabbed by a strong hand to keep his head completely still.

“This is so vexing…!” hissed M1, shortening the distance between his and M0’s face to a mere half-inch, their breaths mingling together as one. “I know you did it because you needed to know what they are concretely but... You stink of Yamase’s blood! The fact that he marked you in such ways makes me angry enough to slaughter him!”

“He didn’t mark me in any way,” corrected M0, his hands wrapping around M1’s arm to try to slacken his hold on him just the slightest, even if he didn’t feel any pain at being handled in such rough ways. “If we were to analyse it as such, then I forced him to mark me.”

“Whatever way you want me to see it as, what makes me angry makes me angry,” said M1, his voice as cold and sharp as a steel knife, though his grey eyes remained as gentle and loving as every single time he had M0 under his gaze. Softly, he motioned his free hand up and slowly caressed his features, his thumb threading over M0’s soft and plump lips and lightly pressing down on them. “I really wish you would let me kill Yamase because if before he bothered me, then now he’s the one human I want to get rid of the most in the whole world. Even taking our mission into account.”

“Nn...!” In the matter of a fraction of a second, M1 pressed his thumb more strongly and swiftly parted M0’s lips, not giving him enough time to react before his mouth came crashing down on his, a slippery tongue readily penetrating his open mouth. “Mmnh! Iru— Mmnh—!”

Slowly, M1 let the hand gripping M0’s neck slip away and his body pressed even more tightly against him, all the while he leisurely licked the insides of M0’s mouth with his tongue, taking great relish in the way his body squirmed around against him. When their mouths came apart after intense minutes of tongue rubbing against tongue, against every single nook and cranny that it could reach, a thin shiny string of saliva stretched in between their panting lips.

“Yes, much better,” acknowledged M1, wiping the saliva that had dribbled down M0’s chin with the back of his fingers. “Yamase’s mark has now been eliminated from your body.”

“Haa... Haa...” Panting hard, M0 felt his whole body shivering as M1 continued to softly caress his features, his eyes perpetually locked down on M1’s. “W-What was... haa... this...?”

“I guess we can call it an updated version of kisses?” answered M1, not fully sure what type of explanation he should provide since not even he knew what exactly they had just done. He motioned his head forward and leaned his forehead against M0’s, whose cheeks were lovingly painted in red. “Did you dislike it?”

“I would never dislike anything that you may do to me, Iru-kun,” softly said M0, leaning into M1’s touch and delivering a quick peck to his lips. “You can do whatever you want to me but please don’t involve others in it.”

“You never play fair, do you?” scoffed M1, retributing the previous peck with one of his own. “But your kindness and consideration with others is a double-edged sword, Rei. It will eventually get you killed.”

“You don’t need to worry about that, Iru-kun,” reassured M0, his arms wrapping around M1’s neck as their faces grew closer to one another once again – close enough for their breaths to gently tickle their skins. “Your selfishness balances everything. Just like your light balances my darkness.”

“That’s something that I can’t help but agree with,” acknowledged M1, a mischievous smirk on his features as he closed the distance between them to an absolute zero and lips got once again locked in one another. Tongues entwined even more fervently and breathing rhythms grew more ragged, wilder – the privilege of truly being alone for the first time since being apart from one another for over 18 years was a delicacy that M1 couldn’t help but abuse of.

“Mmnh... Iru...kun...” softly whimpered M0 against M1’s mouth, his eyes flickering towards the end of the alley they were clustered in for a brief moment before slowly closing yet again. “Haa... I... love you, Iru-kun... Mnmm!”

“I love you too, Rei,” whispered M1, a couple more long and wet kisses being performed afterwards. “I’ve loved you every single day of my life, even before I was born. I’ve loved you since before we were cruelly torn from one another over 18 years ago.”

“Nn... But that doesn’t... haa... matter anymore,” said M0, a soft smile on his lips as he gently bumped their foreheads against one another. “We might not have been able to be together at birth but I’m sure we will be at death.”

Not yet, though. Not yet.