As one of the Seven Demon Gods, even though Chiyo possessed the Authority of Lust, she wasn't as 'wanton' or promiscuous as people might imagine.
If anything, Chiyo was more restrained than any demon, with even higher standards!
Because this Authority could bring her endless benefits, but it was mutual for the other party.
And honestly...
She either wasn't interested in anyone, or the ones she was interested in were women.
In truth, Chiyo wasn't born a Demon God. The Demon God title had been passed down through several generations.
Her original mother was a succubus, a true Demon God of Lust. After an intimate encounter with her husband, the Demon God of Pride, she gave birth to Chiyo.
She was practically an illegitimate child, shunned by the succubus clan since childhood.
Born among the succubi, yet she possessed more Black Goat lineage, with only a tiny trace of succubus blood.
Not only Chiyo, but even her mother found it strange.
However, Chiyo's talent was astonishing. After her mother's death, she stood out among many candidates and inherited the Authority of Lust, becoming one of the Demon Gods.
...
She never got the chance to find someone who stirred her heart, someone she would willingly give everything for, before the war broke out.
Just unfortunate timing. She hadn't yet reached her peak, unable to fully unleash her true power.
But with her Black Goat lineage, her combat ability was not to be underestimated. After all, her father was the Demon God of Wrath from two generations prior...
After being ousted from the Demon God position by his own more talented son, he took in Pride, waiting for him to grow and become his wife, helping him become the Demon God and acquire the Authority of Pride.
And then...
He got together with her mother.
Anyway, that was the situation. Chiyo, with her formidable combat power, killed countless humans and faced off against three heroes.
Additionally, a dark mage was ambushing her from behind.
This dark mage was an ancient monster who had lived for tens of thousands of years, having acquired numerous abilities from the dragon race.
Once an extremely powerful mage, she had now fallen into darkness.
Through this dark energy, imbued with astonishing draconic grudges, she cursed Chiyo.
The mage simply wanted to use this war to transfer these things within her to Chiyo.
She didn't want her to die; as long as Chiyo lived, she could continuously transfer these things to her.
But who knew Chiyo would self-destruct, quickly escaping with her personal dimension, leaving only her head as she hid in an extremely secluded place.
Losing her body wasn't a problem; she could recover.
But after using all the medicines and items in her personal dimension, she realized how terrible the curse was...
Afterwards, Chiyo completely sealed herself within an underground cavern and fell into a deep sleep.
All she needed was for a destined female human to appear before her, allowing her to use a forbidden art unique to the Demon Realm to reincarnate and restore her body.
The cost would be amnesia, and her abilities wouldn't recover for over a decade, perhaps even longer.
Anyway, that was the situation.
That was why, when Mamako found Chiyo, she was just a head, and the cavern was filled with treasures.
Mamako's arrival automatically triggered the forbidden magic that Chiyo had cast before falling asleep, enabling her reincarnation.
Likewise, the curse within her was sealed with all her might. How long it would hold was up to fate.
After all, this curse was formed from the grudges of countless deceased dragons. Even if it could bring unimaginable power, it would only lead to complete corruption.
"So, you've recovered your strength now, but the seal from your past life broke at the same time, leading to this situation, right?"
"..."
"I see. No wonder I felt traces of dragon energy earlier. So that's where it came from."
It seemed that mage was indeed quite devious.
Perhaps she was the one who instigated the war that led to the dragon race's destruction.
Even if she wasn't the instigator, she certainly played a role behind the scenes.
Given that dragons were treasures from head to toe, they could indeed bring unimaginable benefits and power boosts to a mage.
"Now that I've removed the curse for you, I think your body should be fine."
"No, if I return to my world, the curse will appear again. It's a curse that has penetrated the soul."
"For now, it's not present because we're in a different world, is that it?"
"Yes... The grudges of countless dragons... enough to make anyone wish they were dead!"
Dragons, after all, were a very powerful race. Their mastery of magic was no less than that of humans.
Otherwise, why would legends like ancient dragon magic exist? Dragon magic was never weak.
"It sounds quite... fantastical?"
This touched on a blind spot in Kaito's knowledge.
Even though he now knew many spells, even learning quite a few good ones from Index.
Ultimately, he hadn't learned all spells, and more importantly, he had little knowledge regarding soul magic.
His own abilities didn't allow him to interfere with or manipulate souls.
He could bring someone back to life, but he couldn't create a soul from nothing.
Resurrecting people relied on revival items obtained from gacha.
Basically, it was using powerful healing to revive those who hadn't been dead long.
"Interesting. Don't worry about this! When we go to your world, I'll come with you to meet this dark mage."
Even if magic couldn't achieve planet-destroying levels of power, large-scale and forbidden magic could.
Moreover, magic could be very sinister, unimaginably so.
Many fantasy games or horror games with fantasy elements were like that.
So sinister that even if you were powerful, you'd still suffer against such magic.
But still, it was worth a try, right?
Later, he'd have Misuzu bring Index over! See what other magic she had stored in her brain!
The magic from the Toaru Majutsu no Index World could even create Magic Gods. Perhaps it might be of some help?