How much time had passed? I had already forgotten my sense of time. The only thing facing me is the girl in front of me.


　Claire. My sister. Their appearance is very similar, and even their fighting styles are similar. It's as if they were intentionally designed to be so, and we continue to launch the same attacks. We combine the Invisible Blade, which is activating the Divine Sanctuary with each other, and the Invisible Blade. Their swordsmanship has already surpassed the realm of humans. They were both human, but they were also demons. Particularly noticeable are our combat skills. We twins had been enhancing each other.


　It was an instinctive sense of awareness. With each swing, we felt our growth. The speed at which magic is constructed increases. What is this visible world all about? No, I don't already rely on sight alone. A sixth sense, I should call it the sixth sense, urges me to go faster, stronger, more. Faster, stronger, higher.... That was the only sense I had right now.


''Hahahahaha!　I love it!　It's great!　I knew my brother would fill me up!　That war filled my unfulfilled heart!　Hahahahahaha!　I'm about to come!　Hey, brother!


　Claire's highs were unstoppable. The more she let her emotions explode, the more her basic abilities improved, or perhaps she was expressing her pleasure with her entire body. The attacks they unleashed on each other. They were all caused by the Invisible Sword 《Invisible Blade》, but they didn't perceive each other with their vision. When I caught the Invisible Blade's trajectory in the Sanctuary, my body reacted in a world of less than a second. I was still fighting with the Compound Dagger 《Multiple Knives》, but Claire had already discarded the knife.


　She was a single sword 《Vine》. That attack, which is unleashed with all four limbs, is tough just to receive it. It's also extremely difficult to avoid them. Even so, I was still dealing with it. Unlike before, I hadn't yet destroyed myself. Rather, my condition is rising even higher. I'm climbing to greater heights. There is no ceiling in sight. How far will the true value of that liberation take me?


　At this moment, a magical image instinctively appears in my brain.



It's called Diffusion.


　It's a magic that temporarily disables the opponent's personal field. It's a type of non-attribute magic, but this is completely original to me. I only used it because I thought I could do it. If you can peel off that personal field, you can certainly kill Claire. This was the magic that I activated from that thought.


　And when it's peeled away from Claire's cover, I pile on more magic without pause.



''--Explosive Four-Splash [Full Burst].


　It's an attack fired from the compound dagger 《Multiple Knives》, but its trajectory is already not a straight line. I can already use magic. The meaning of use here is not limited to non-attribute magic. I am already able to use all kinds of magic after awakening. And the accuracy of the magic that was used without any problems before has also increased. It's a good idea to be able to use the same amount of magic that was previously impossible to do.


　I'm going to be able to have a look at a few of the things that I've seen in the past. It's a good idea to have a good time with a good friend. Furthermore, I'm going to launch my final attack as if to say that it's time to call it a shot.


Meteor 《Mitia》.


　It's just a straight line of attack from my finger. However, the speed of the attack surpasses not only humans, but also the superhuman perception of the demon race. It's just an attack that has reached the ultimate in physical speed. It is as fast as light. As light magic, it's almost comparable to the speed of light, even if it's pseudo. As a kind of laser beam, it increases in brilliance as it is, and then it goes straight ahead at once.

　All the magic elements in this place are already under my control. The many magics created in my brain one after another attacked her without mercy.


''Hahahahaha!　I love it!　Nice, nice, nice!


　Even though she has been stripped of her inherent domain and her magic's effects are now direct, Claire still stands boldly against it. There was no fear visible in that action.


　The light from the Meteor 《Meetia》 landed on her opponent the moment she perceived its brilliance. However, when Claire catches that light with her twin eyes, she ducks it with only a slight tilt of her head. As if her intuition was excellent, she was able to see through the Meteor 《Meetia》.


　But these attacks are a foothold to distract her. I'm not going to be able to get to the point where I'm going to be able to get to the point where I'm going to be able to get to the point where I'm going to be able to get to it.


　And the offensive and defense that seemed like an eternity came to an abrupt end.


''It's.......over.


　At this moment, I cut off her left arm. Although I didn't manage to decapitate her, she still wasn't able to dodge my attack, and Claire's left arm was flying in the air.


　The severed arm fell to the ground with a botfly, already gone from the elbow. I knew. If this continues, my reaction time will be faster than yours. It's not just magic. It's not just magic.


　And the competencies that are in competition with each other will suddenly collapse.


　Claire is certainly strong as well. If it was me before, I would have barely been able to keep up with her. But now that I've also released my demon's ability, I'm on top of her.


　It's a good idea to be able to have a good idea of what you're looking for.


''........''


　Decapitation. That's not what I did with the Invisible Blade, Invisible Blade. The Four Explosive Bursts 《Full Bursts》 were still lingering here. Claire continued to duck it, but that deadly blade that continued to track her was mercilessly cutting off its head.


　There was no regret. I just did what I had to do. That was all. Even if they were flesh and blood, they were demons and enemies. Then there was no reason to condone it. I'm sure you'll be able to find the best way to get the best out of it.



　Okay, here we go!　That's my brother, taking off my arm and my head, too!　I wasn't fulfilled in that ogre village, but now it's different. It's so much more fun now!　Yeah, it's fun!
"...alive?　No, this is.....



　Yeah, I know. Claire's laughing. She's laughing. Her head certainly flew in the air. But she is alive. And in a state of five bodies. Meaning, I don't know what it means ... what does it mean?　At the same time, a thought had flashed through my brain. Don't tell me this guy........is he the one who used that ability?　Well I was beginning to expect it. And I was now wondering what this guy had said.


'An ogre village?　No way....
Do you want to know?
Did you kill him?


　Judging from the way she spoke, Claire wondered if she had done something in that village. Then, she begins to speak with a grin and sneer, as she had done before.


''I killed them. Of course, I killed them all!　Hahahahaha!　Well, they were all small fry, but there was one guy who was strong...................He was the head of that village, but it took him 10 minutes to kill him. I had to kill him...
You're the one who killed Mr. Edgar...



　I suppress my emotions. The people I've been a part of have died. And when I find out that it's the woman in front of me who did it, I almost explode with killing intent. No, that's not all. The tragedy of that attack. And then there's Ellie's case. I'm not saying that Claire is connected to everything, but still, this guy is also a demon and an avenger to humans.


　This black emotion that fills my heart. The clear killing intent of wanting to kill fills my heart. But........if I become emotional here, I will lose myself. I will be driven by the urge to destroy everything. I had to restrain that much. I'm awake now, but I'm still unstable. If it's only Claire who's here, but there's also Shelly, Senpai, and Princess Liane. If I were to let them all go, the whole place would collapse.

　That's why I keep pushing them to death. I suppress this big, blackening killing intent with reason. I clench my fists, and blood is flowing from my lips. How far and how far do I have to go to taunt people to make them feel better.... This kind of unreasonableness must end quickly.



''Fufu................ My brother is a human after all, isn't he? Its constituent elements are human and demon. But his heart is still human. Unlike me, he's not a demon. That's why........this is what happens!


　A moment later, Claire's right eye emits light. I can't look directly at it...........but it was already too late. I'm not fast enough to resist the speed of light.


"--Death's greed (Thanatos).


　What was waiting for me when I looked directly at it was a completely different world.



　◇



This is....


　Earlier, I was downstairs. I was in that place fighting with Claire. And yet, I'm in a completely blank world.

　When I was stunned, Claire appeared out of nowhere. Of course, I will continue to fight no matter where I am. I immediately try to activate the Invisible Blade, but it doesn't work...?


Hmm. Welcome to my world.


　Claire had regained her composure and muttered that in a more calm voice than before. We're alone in an empty, blank world. I only have a bad feeling about this. And what in the world is it that magic doesn't activate........


I'm sure you'll be able to find out more about this. It's a good thing that you're not the only one. That's why I can't catch up with you. But.........what I have is my essence here. It's this world.
A singular ability called Extra, a form of mental interference...
"...correct. Now, can your brother stand it?


　When Claire quickly disappeared, I was strapped into a chair. If this is her mental world, then it's no wonder that anything is happening. But.........no way........

　An unpleasant premonition flashed through my mind. Then I noticed that the bottom of the chair was on fire. It's hot. I can definitely feel it. The sensation is still dull. But the sense of pain was definitely present. This was definitely the pain ... itself.


''Ahhhhhh!!!!!


　Scream. I scream in too much pain. And then, without a doubt, it was death itself that attacked me. Death caused by all kinds of torture. Skewering, crucifixion, burning at the stake, Iron Maiden, guillotine, stretching, inquisitorial chair, all of these images assault me. How far painful death is. An image of death that could make me lose my mind. No, it's not an image. It was not at all comparable to reality. Rather, this pain is the only thing that is no different from reality.


　This is the ability to trample on a person's dignity. I was taking it head on. The vicious and fearless peculiar ability 《Extra》 to all intents and purposes. Ordinary humans can't and won't experience death. It is because dying is to cease to exist. Experience, experience is something that is possible only because it exists. But I do indeed experience death. I continue to receive that contradiction in my body. I don't know why........can I endure this pain, when in the world will it end....


　It gives the other party an overwhelming fear that one cannot fundamentally resist.


　Is this what Claire's true value was........






　The next thing I knew, I was back in that underground space. I put my hands on the ground and wiped the sweat from my body. Without a doubt, I was dead. No, I had experienced death. And between my eyes, Claire, who was covered in sweat all over, just like me, was smiling at me with a smile.


''........How do you feel?　Did you have a good time?
You're not.....you're not....
'Of course, brother. The pain in that world is reflected in me. At that moment, my brother and I had met many deaths together. But I knew you were special, big brother!　I'm so proud of you for being alive under the influence of death's desire (Thanatos)...........oh my God. I love you so much, I love you, brother........


　This is insane. No ... they are no longer in their right mind. We are living in a world of madness. And is it the same for me as well? Even though I have just experienced death, this body moves. Despite the mental damage, I still had the will to fight.

　I was confronted with the fact that I was a monster just like her.


''Haha, no.............................''


　I mutter to myself. I am a monster. I am not sane enough to possess this deformity. I'm human at heart, so I'm fine. I thought so. But then I realized that my heart is also a monster. I almost lose sight of my own existence.


　But still, I didn't forget my mission. I can't fall down here for the sake of those who died. No matter how much death I have to go through, I will continue to move forward. I will kill my family members. That is the role I was created to play.


"Claire, it's time to end this.


　Then I wielded the deadly blade again.