Kaguya-hime read Takumi's message.
After thinking it over, she agreed.
Black Abyss White Flower, huh? That seemed usable.
But could she actually use it? Wasn't Black Abyss White Flower something not just anyone could wield?
She didn't have Honkai energy, after all.
So she probably wouldn't even be able to activate it.
Takumi: [No worries, I'll make a disposable one.] [It'll work on activation.]
No big deal.
Was something like this difficult for Takumi? Of course not.
Kaguya froze when she read that.
A single-use version? Seriously?
Can't he be a little more generous?
Houraisan Kaguya: [At least ten uses!!] [One use? Who are you trying to fool?!]
She wasn't asking for a permanent one, but Black Abyss White Flower was seriously useful.
A Divine Key of both deconstruction and creation.
Its destructive function disassembled all in its path, while its creative power healed damage.
That made it absurdly convenient.
Of course she wanted more uses.
Fujiwara Chika: [Wait, I have a question.] [Wasn't Patchouli's asthma actually cursed?] [Can Black Abyss White Flower really treat that?]
Wasn't her condition curse-based?
Could this gun really treat it?
It'd be a problem if it didn't work.
Takumi: [Not a problem!] [A curse is just something that gives you a condition. Asthma's a condition. We treat the condition.] [Just a genetic flaw. Fix the genes. Done.]
A curse?
In scientific terms, it was just magical energy causing genetic damage.
So fixing the genetic code with Black Abyss White Flower would solve the issue.
No problem at all.
Fujiwara Chika: [You can explain it like that?!]
Wow!
Is that really how it works?
Takumi: [Of course. Who do you think I am? If I say it works, it works!] [I didn't gain knowledge from dozens of worlds for nothing.]
Curse-based magic was essentially gene-targeted attacks.
It broke your body's genetic structure to induce disease, or cause other bizarre effects.
All of it could be rationalized.
So Takumi handing Kaguya a Black Abyss White Flower for treating Patchouli's genetics was no problem.
Houraisan Kaguya: [Okay, then it's settled!] [Hand it over.] [If it doesn't work, you owe me a Holy Mother's Smile.]
Deal done.
Since Takumi said it would work, might as well try it.
If not, they'd figure something else out.
Takumi, after that conversation, crafted a Black Abyss White Flower on the spot.
Usable ten times.
After ten uses, it would shatter.
Once complete, he sent it to Kaguya.
Takumi: [Exclusive red packet for Houraisan Kaguya] [Take it!] [Now send me the magic books.] [I need them right now.] [I'll return them after I finish copying.]
Just like that, they completed a backdoor trade.
Kaguya had no issues with that.
Houraisan Kaguya: [OK, I'm heading to the Scarlet Devil Mansion now.]
She claimed the red packet, then sent Takumi some of the books she had.
With that done, she left the house.
Takumi received the books and began recording them quickly.
Elemental-based magic.
Five elements: Fire, Earth, Wind, Water, Lightning.
He recorded every one of them.
As Takumi worked, Kaguya arrived at the Scarlet Devil Mansion.
Sakuya Izayoi immediately greeted her.
"Princess."
She gave a small bow.
"I'm here to see Patchouli." "Go back to your duties."
With that, Kaguya walked straight in.
She was quite familiar with the place.
She had visited several times.
Sakuya followed behind.
They reached Patchouli's library.
"Patchy~!"
Kaguya called out as she entered.
Patchouli frowned.
"Don't call me that!" "I am not... Patchy!!"
As she spoke, she sneezed.
Awkward.
"Never mind the details!" "I've already negotiated with him." "Lend him your magic books for a bit. He gave me a weapon that can treat your asthma."
Kaguya explained.
Patchouli's eyes lit up.
"As long as he just borrows them, that's fine." "Just return them later."
Patchouli had no problem lending her books.
Besides, there was always that black-white thief coming and going.
As long as they were returned, it was fine.
Seeing that, Kaguya handed her the weapon she got from Takumi.
Patchouli stared at the gun.
"What is this weapon?" "It gives off a dangerous aura."
Just then, a small figure entered the room.
Remilia Scarlet, crouching with her hands on her head.
She walked in and saw the weapon Kaguya was holding.
Even she was a little surprised.
"Black Abyss White Flower!" "This gun can heal Patchouli's asthma."
"Let me see... I think this is how it works."
She activated the weapon's sealed function.
"Zero Rated Power: HeiligeLanze, die Welwitschie!"
As her voice fell, a soft light blossomed.
Everyone in the underground library was stunned.
Even Remilia, a vampire, was taken aback.
The light was gentle, with no harm to vampires.
It wasn't holy light.
This light, rather, gave off a comfortable warmth.
Kaguya directed the power of the Divine Key onto Patchouli.
In that moment, Patchouli felt warm all over.
Her weak body began slowly improving.
Her asthma began to fade.
As Kaguya unleashed the Divine Key's power, Yukari Yakumo—who loved to spy—immediately turned her attention there.
A gap opened in a corner, and Yukari peeked through, watching what was happening inside the underground library.
She was stunned.
That must be an artifact from another world.
Kaguya had brought out something truly different.
Yukari had long suspected as much.
But due to Eirin's presence, she hadn't interfered.
Now, Kaguya brought out a weapon like that?
How could she not be curious?
No, rather...
How could any yokai not be curious?