Spirit of Reversal against the World

I'm going to school after the conversation with Origami, the day was quite normal although Shiori started trying to flirt a bit, but she's clumsy and really bad at it.

A few days have passed as I got some things in order and tested others, I made some plans that I want to put into practice.

Now it must be around 10 pm at night.

"Aurelio-san, you're so clueless sometimes, it's nighttime and I was busy, can't you see that forcing a lady out at this hour is a lack of chivalry?" Kurumi says irritated with me.

"Yes, that's a real lack of chivalry... but I don't see any ladies around here," I reply in the same tone as her.

"Tsk, Aurelio-san has become even more of an asshole in this new world, could you at least tell me what we're doing here?"

Right now we're in a dilapidated park.

"We're here to kill a spirit and you're going to be my assistant in this venture," I say to her as if it's the most common thing.

"Hihihi Aurelio-san, it seems you've been doing things in secret lately," She soon arrives at the obvious hypothesis, if I know where a spirit is, it's because I searched for and found it.

"Yes, yes, I need your help to ensure the death of this spirit with 100% certainty," It's not a 'dangerous' spirit in the anime, but this spirit has an insane ability that wasn't fully utilized due to her actual age.

She can transform one thing into another, to the point where she transformed a falling satellite capable of destroying Tengu into something harmless.

She is undoubtedly one of the strongest spirits.

"And how will it be, Aurelio-san?" Kurumi asks curiously.

"I'll transform into a child, I'll deceive the spirit and at the right moment you must shoot her directly in the head at point-blank range while I'll try to cut her head off with my angel," I can deceive her and with Kurumi's stealth, this plan becomes viable.

"Hihihi Aurelio-san is so cruel when planning the downfall of others, I wonder if you already know how to kill me," She says in a malicious tone.

"Maybe," I can't say I can kill her yet, but there's a good chance I can.

"Now hide, the spirit will soon arrive, the signal for you to attack is simple, a snap of the fingers," Kurumi activates her astral dress and disappears into the shadows.

'I hope there are no setbacks...' I soon activate my astral armor and use reversal on myself, thus becoming a child.

I begin to wander through the park, looking for Natsumi's presence that I know is here, it was quite difficult to find her.

For some reason, she likes to stay in isolated and dilapidated or closed-off places.

As I wander through the ruined park, I finally feel a presence, she seems to be observing me.

'She's not very good at hiding...' I continue to wander, perfectly imitating the behavior of a lost child.

"Hello, little boy-kun, what are you doing in this park all alone? You might end up finding a little monster, it's a good thing it's me, Natsumi, a kind big sister, who found you," Natsumi appears.

"..." I look at her carefully, her adult, voluptuous body full of perfect curves makes it hard for anyone to think that her true form is a child who is a complete flat board.

"Hyaa, little boy-kun is so naughty, staring at this big sister's breasts," She says playfully while puffing out her chest.

'Ah, yes... I forgot she was like that...' Annoying to say the least.

"Big sister, I got lost," A smile appears on her face when I call her [big sister], apparently she likes that, anyway, she was quite playful with the Shido in the anime...

Until she thought the Anime Shido saw her real form, then she started tormenting him by turning everyone in Shido's house into children and then making them disappear.

'If I'm not mistaken, she replaced one of them with herself, and it was the Yoshinon that stays on Yoshino's arm... or am I too crazy and don't remember the script?... doesn't matter, I'll kill her before she can use her powers.'

"Don't worry, little boy-kun, your kind big sister here will help you find your way... but don't you want to play with me a little before you go?"

'That way, you sound like a damn child kidnapper.' I know she's referring to playing literally like two children, but the way of speaking is strange because of her very adult body.

"I want to play, big sister, what are we going to play?" In the anime, she didn't actually end up playing with Shido, because she thought Shido had seen her real form and so she got extremely angry.

"Tchrammmm" She makes an excited sound and soon a large part of the dilapidated park starts turning into fully functional toys.

'...Wish I had that ability for myself...' Generating weapons, altering the environment itself, and even transforming the body of my enemy, this is simply absurd.

'Incompetent girl...' She managed to lose even with such incredible power, she was injured by Ellen in combat and needed help, and she didn't even have her powers sealed yet, so it's simply ridiculous.

It's like having a weapon of mass destruction but not being able to activate it because you don't know how to remove the glass protection from the button.

"Which one do you want to go on first, little boy-kun?" She says excitedly as she opens her arms in a playful way, making her breasts sway.

Given her personality and her ridiculous way of using her powers, I know my plan will work, if even Ellen almost killed her, nothing prevents a good strategy from killing her.

"Big sister, I want to go on the slide," I say in a childlike manner as I point to a very large slide surrounded by glitter and plush toys.

"Hehehe, let's go, little boy-kun, let's have fun," She grabs my hand excitedly and guides me to the top of the slide using a fluffy pink cloud as a means of transportation.

We slide down together as she seems excited about these childish acts, then we move on to various different toys.

She treats me childishly while always trying to emphasize how she's a "big sister," to the point where it's really annoying, especially since I have to pretend to be a normal child who believes her.

After a few hours, it must be around 1-2 in the morning.

'What a delay...' I think it's enough, I decide to try to see how much she trusts me.

"Big sister, I'm tired..." I say blinking my eyes with fake sleepiness, she looks at me with the same energy as before, as a spirit she obviously doesn't get tired.

"Uhmm... Okay, little boy-kun, I'll take you to a safe place so you can find your family..." She doesn't seem very excited about the idea of us separating, but I simply don't care.

I stumble on the ground, pretending to be very sleepy.

"Big sister... could you carry me?... I'm tired..." I say in a dragging, tired voice, appealing to sentimentality.

"Okay, little boy-kun, come here," She crouches down and opens her arms, I climb up and let her carry me while I count down a timer.

The moment the timer runs out, I'll kill her. She starts carrying me, flying on a strange plush toy, we're considerably high up, after a while she lands in an empty neighborhood.

"Listen, little boy-kun, your big sister can't go with you, but you can find guards by following this street, come visit your big sister anytime, okay?" She says with a smile as she puts me down.

"Big sister, I think I hurt my hand, can you take a look?" I say innocently.

"Of course, little boy-kun, let your big sister take a look for a moment," I show her my right hand.

"Uh? Little boy-kun, there's nothing wrong," When she looks closely, I snap my fingers.

Soon, several pale hands emerge from the shadows and hold Natsumi's legs, while an extremely fast Kurumi appears next to Natsumi, aiming her gun directly at Natsumi's head.

At the same time, I quickly summon my angel and cut from bottom to top, all of this done in a fraction of seconds.

The final result, we have Natsumi decapitated and with several gunshot wounds to the head, without her spirit power active, her form returns to that of a child.

She died quickly and painlessly.

"Pfff HAHAHAHAHAHAHAHA" Kurumi laughs at the situation.

"Aurelio-san, I never thought this would work, it seems you really know what you're doing," Kurumi says, containing her laughter.

"Yes, I do, now you can go," I start the process of extracting her Sephira, I create barriers around the body and do everything necessary.

"Sure, I'll see you at school, Aurelio-san," She says as she disappears, it must have been thrilling for her, and the reason is obvious, a spirit was easily killed.

Something she could never do alone.

This gives Kurumi a certainty, the certainty that I am an ally as good as she imagined I would be.