Since I was the one who picked out BB's clothes, I could imagine what she'd look like in them.
At least, I thought I could.
But seeing her actually wearing them went far beyond anything I'd pictured.
She looked even better.
"Sexy, but pure. Rough around the edges, but still intelligent. That's the vibe, right?"
BB laughed as she pulled me into the fitting room.
I agreed completely.
The outfit was unified in black overall: sleeveless on top, hot pants below.
Just like BB said, it felt sexy and neat at the same time.
"Yeah. It suits you really well."
"Hmm. Nice. Then I can just wear this whenever we go out from now on."
"Sounds good. Want to buy a few more outfits too?"
"Yes, Senior♡"
BB smiled brightly and hooked her arm through mine.
The sleeveless top clung so tightly to her body that the distortion of her breasts showed with merciless clarity.
'Jesus. This is insane.'
She was so indecently alluring the only thing that came to mind was, Look at that.
BB's signature soft fragrance drifted around me.
She was packed with the kind of charm that made restraint impossible in every sense.
So with my eyes half bloodshot, I started grabbing clothes more or less at random.
Of course, I still made sure they suited BB.
Even if I was in a hurry, I wasn't about to buy her something that didn't fit her.
I grabbed BB's hand and strode off roughly.
Walking half a step behind me, BB's lips curled into a sly grin.
"Aaah, Seniooor...♡"
I glanced back and saw her smiling like a little devil.
It was an expression perfectly worthy of that nickname.
She knew exactly what I was thinking, and instead of refusing, she only teased me.
If she wanted to, a Servant could have shaken me off by force.
And yet she obediently let me lead her all the way back to the hotel room I'd used before.
I even called a taxi, something I normally considered too expensive to bother with.
At this hotel, I was a VIP.
Even without a reservation, I could get a room whenever I wanted.
Hell, I didn't even need money.
I still kept in frequent contact with the hotel owner, and we were on very good terms.
Thanks to that, I got a double room and dragged BB inside with no hesitation.
I seriously couldn't hold back anymore.
"Aaah! Senior, with your eyes that red, if you push me down like this it's scary♡"
BB smiled with her eyes as she fell back onto the bed under the force of my shove.
She said it was scary, but her face was full of anticipation.
"BB. You were the one who seduced me first. Got it?"
I crawled over the bed like I was pouncing on her.
Looking down at BB lying right beneath me, it felt like my eyes might burst.
My body was burning too.
Blood thundered through me so violently it felt like my veins might rupture.
In short, I was wildly aroused.
I couldn't control it.
"Senior...♡ Hurry up and hold me."
As if she'd been waiting for that, BB stretched out both arms and wrapped them around my neck.
It was permission.
"Aaah...! Senior, Seniooor—♡"
I immediately fell on her with rough hunger and ravaged her with everything I had.
The bed creaked so hard it sounded ready to break apart.
It was a relief that the last shred of my reason kept me from tearing her clothes off, but...
The bed ended up soaked through.
"Haaah..."
By the time I came back to my senses, dawn was already breaking.
I really had gone at it like a madman.
"Ooh, oohh, ooohh— Senior, Seniooor—♡"
BB, thoroughly defiled by me, smiled beneath the blanket.
Her nape.
The upper swell of her chest peeking faintly into view.
There were marks from my teeth all over her body.
"...Sorry. I was too rough, wasn't I?"
Facing BB, the first thing I did was apologize.
BB seemed to have recovered a little herself. She looked at me and gave a drained, languid smile.
"Not at all. Though I never imagined you'd propose a relationship this intense before we were even dating. You've really turned into a beast while I wasn't looking, haven't you?"
"Maybe it's because I got close to the other Servants."
"Hmm. I see. So what you're saying is you've become a complete womanizer?"
"I can't deny it. After being reborn, my greed got bigger. And everyone else's did too."
"That sounds like the typical excuse of a timid man who can't make up his mind... except coming from you, Senior, it sounds more like the line of a trashy playboy. You know that, right?"
"Ahem."
I gave a light cough and nodded.
You couldn't build a harem with an ordinary mindset.
"I'll admit it. That's why I don't want to lose you either, BB."
"Hmmmm. Is that so? It's still a pretty trashy thing to say, but I'll give you credit for properly showing your possessiveness."
Drenched in sweat, BB slipped neatly into my arms.
Even soaked in sweat, she still smelled wonderful.
Holding BB, I almost drifted off comfortably too, but in the end I only dozed for a bit.
The sun was going to rise soon anyway.
So we rested in each other's arms for a while, then went to wash up in the bathroom.
Together.
"I never thought I'd be having a hotel date on the very day I was summoned. Seeeenior."
We were drinking coffee in the hotel lounge.
Sitting beside me, BB crossed her arms and gently tickled my stomach.
It felt like she was egging me on.
Or maybe teasing me.
Either way, I had nothing to say in my defense.
"This is all your fault, BB."
"Mm-hmm. If it's because I was cute and sexy, then I'll graciously accept that."
BB lifted her chin proudly and puffed out her chest.
The soft, weighty sway of her breasts drew every eye in the room.
Mine. The people enjoying their morning coffee. Even passersby.
"Anyway. We should head home and greet everyone else first, right? After that, I'll take a look at this Itadori person's condition and revise the dive formula accordingly."
"I'd appreciate that. Seriously."
"Sounds fine to me. After that, I'll examine your body too, Senior. You said you've achieved materialization of the soul, so it's fine if I analyze you in detail, right?"
"I'm counting on you."
The word analyze sounded a little scary, but really it was basically a medical checkup.
Nothing to be afraid of.
"This might be a little late to ask, but can I ask you one thing?"
"Hm? What are you curious about? My measurements? Or..."
Slowly, BB brought her lips close to my ear.
"My sensitive weak spots?"
Jesus Christ. Whispering in that sweet voice right into my ear sent a shiver through me.
In a good way.
'I need to ask her about that later.'
I had a rough idea already, but I wanted to hear it directly.
There was no way I could resist.
"I'm curious about that too, but later."
"Oh? Then what are you curious about?"
"I was wondering why you've suddenly gotten so nice. BB wasn't usually this... well, like this."
BB, who had been smacking her lips in satisfaction, narrowed her eyes.
She looked a little sulky.
"Haaah..."
I had expected this reaction, but I still wanted to clear this up properly.
Maybe that was why BB let the frown ease from her face.
"We don't exactly have an ordinary bond, do we? And then you went and threw your life away of your own accord to sacrifice yourself... seeing that made my heart ache."
Her heart had ached.
And because of that, the way she thought had changed.
The explanation felt a little thin, but BB's expression was earnest.
She wasn't lying.
Maybe it was because she was an AI, but while she might hide things, she didn't lie.
That was BB.
"If that's the reason, then I don't really have anything to say. Koyanskaya said something similar too."
"Mm? You're bringing up another woman right now? You do realize that costs you points, right?"
"I know. I do. But there aren't many names more persuasive than that one."
"I can't deny that. Their standards for loving humanity are completely warped, after all."
BB nodded as if there was just no helping it.
Well, if it was Koyanskaya, fair enough.
"Thanks for understanding."
"You should feel honored to have such an understanding junior. And even if there are other people around, you need to keep giving me affection consistently too."
"Of course I will."
Both before and now, I tried to take the best care I could of the Servants who came to me.
BB was obviously no exception.
When I answered with confidence, BB smiled, satisfied.
"Shall we head home now? I'm curious about the other Servants too, but I'm also interested in the two people you live with."
"Let's go."
I drained the rest of my coffee and stood up.
A soft trace of its aroma lingered faintly in the cup.
Kadoc's house.
As soon as Maki and Mai got back early in the evening, they sat down across from BB.
BB's reunion with the other Servants was simple and restrained.
None of them had the kind of personality that would make a huge fuss, and there wasn't much reason to.
That said, restrained didn't mean unwelcome.
Every one of them welcomed her sincerely.
"Hmmmm. So you're the sisters Senior took care of? You're definitely pretty and cute. Nice figures too."
"Ah, yes. Thank you."
Mai answered first, looking a little dazed.
A new member of the household.
She'd heard that was coming for a while now, but seeing BB in person felt different from the other Servants.
She was more modern. More lively.
There was a brightness to her.
Every Servant they'd met so far, even the small-framed Shuten-douji, had possessed a certain dignity.
There had always been something old-fashioned about them too.
Even the modern-looking Koyanskaya had given off a similar feeling.
Because she wasn't truly born of the modern age.
But BB was different. The current BB came from the modern era—no, from the future.
Her roots were different, so naturally the impression she gave was different too.
'This feels... weird.'
Maki felt the same thing Mai did.
Part of it was the awkwardness of a new person joining them, but more than that, BB felt alien.
It was the kind of thing that would probably get better with time.
Someday they'd get used to her, but for now there was no helping the awkwardness.
"You're the older sister, Maki, and you're the younger one, Mai, right? I'm BB, humanity's administrator... no, Senior's personal AI. I look forward to getting along with you."
"Please take care of us."
Maki and Mai greeted her in unison.
The word AI caught in Maki's ear.
Wanting to clear that up, she asked,
"Um, this AI thing is...?"
"You mean the definition of AI? If I explain it from the root up, the story gets a little long and complicated, so I'll summarize it simply."
BB gave them a brief explanation of her existence.
Moon Cell. SE.RA.PH.
Moon Dubai, and everything else.
Laying out every last setting would have been far too long-winded.
And even if she told them everything, there was no guarantee they'd understand it all.
They came from different worlds.
Fortunately, both Mai and Maki already understood the concept of Servants.
That made the explanation much easier.
"...So in conclusion, you can think of me as a materialized AI. Got it?"
"Yes. Thank you."
Maki nodded, still looking a little stunned.
Even among Servants, BB had an especially hard-to-understand side to her, but Maki got the rough outline.
Mai was the same.
"Good. Then that's enough about me... I should go find this person named Itadori now. Do you know where he is at the moment?"
"Yuji? Wait, Yuji? He's at the school right now... don't tell me?"
Maki's eyes widened as she answered.
Because she already knew all of it.
BB's existence. The reason she'd been summoned.
BB answered as if it were no big deal at all.
"That's right. First I'll take a look, adjust the Magecraft formula, and then deploy it immediately. He's Senior's headache, isn't he?"
"A headache... yeah, I guess that's not wrong."
To call Sukuna nothing more than a headache.
Maki was reminded all over again just how terrifying Servants really were.
A monster the entire jujutsu world could crash against and still fail to guarantee victory over.
The King of Curses.
That was Sukuna.
His proper name was Ryomen Sukuna.
But BB and the other Servants treated him like nothing more than a troublesome checkpoint.
They didn't doubt victory in the slightest.
'Now I really am curious.'
There was no reason to doubt their power, but what kind of deadly battlefields had they crossed to become like this?
What were the experiences they spoke of really like?
Maki found herself thinking that even once would be enough—she wanted to experience it for herself.
Only then, she felt, would she understand Kadoc more deeply.
"Senior. Jujutsu High is where you first met Senior, right? Can we go there right now?"
"It won't be difficult."
Kadoc nodded and picked up his phone.
First, he planned to call Yuji and set up a meeting.