After absorbing and gaining control of the Special Grade Cursed Spirit, Geto learned information about it.
This was a Special Grade Cursed Spirit born long ago during the chaotic times of the Western Middle Ages, out of fear of demons.
Due to the chaotic nature of information dissemination at the time, the image of demons was incredibly diverse, yet a few details were surprisingly consistent.
They had tall bodies, gaping maws that could devour a person whole, and they would grant people's wishes, taking their Souls as payment after death.
Later, a witch Sealed the Special Grade Demon Cursed Spirit, and by a twist of fate, it was brought back as an offering by a fleet from the Eastern Great Country, eventually ending up in an island nation.
"A Special Grade Demon Cursed Spirit, huh?"
Geto murmured softly.
After understanding the situation of this Cursed Spirit, Geto turned and approached Eichi, looking down at the Cursed Spirit sisters who were subtly surrounded.
"Aren't you going to tell us about yourselves?"
Geto stood in front of Eichi and asked.
Eichi also understood what Geto meant.
"Leave the next fight to him; you rest well."
In fact, when Eichi and the Special Grade Demon Cursed Spirit were fighting, Geto had already sensed the intense Cursed Energy fluctuations.
It was just that the situation before him made Geto wary.
This was the first time Geto had seen a Cursed Spirit with intelligence, and the Cursed Energy fluctuations emanating from this Cursed Spirit were equally not to be underestimated.
Originally, Geto planned to quickly deal with this strange Cursed Spirit and then go support Eichi, but the Cursed Spirit's actions made Geto even more confused.
She actually offered to help deal with the Cursed Spirit that was fighting Eichi.
"Who are you, and why do you want to help us?"
Unclear about the situation, Geto began to probe the Cursed Spirit in front of him.
After some communication, Geto detected no malice from the Cursed Spirit.
However, worried that unpredictable changes might occur if the Cursed Spirit went to Eichi's battlefield, Geto decided to absorb the Cursed Spirit first and then go support Eichi.
It was also at this time that the Cursed Spirit displayed an ability that made Geto wary.
She wrote something in a pink notebook, and then Geto felt that most of the Cursed Spirits he had summoned were forcibly unsummoned and returned to his Technique space.
Only Cursed Spirits of Grade 2 and above were immune to the unsummoning ability.
The Cursed Spirit's physical combat was terrible, but her strength was surprisingly great, making it impossible for Geto to subdue her immediately.
"Your companion's situation is a bit dire."
Knowing that he couldn't resolve the Cursed Spirit in front of him immediately, Geto finally accepted the Cursed Spirit's suggestion.
Although this Cursed Spirit was troublesome, she wasn't insurmountable. Right now, supporting Eichi, who was encountering a Special Grade Cursed Spirit, was more important.
Moreover, if any problems arose, being with Eichi would allow them to decide whether to fight or flee immediately. Being indecisive like this would only put them at a disadvantage.
And so, the subsequent events unfolded.
"My story? Well, that starts 50 years ago," the girl Cursed Spirit said, nodding her chin, a hint of nostalgia in her voice.
"But I doubt you'd like such a long story."
Suddenly, the girl playfully stuck out her tongue.
The barrier enveloping the entire school began to dissipate, and the girl stepped forward to embrace the Crimson Being.
Under Eichi and Geto's astonished gazes, the crimson color on the Crimson Being's body faded, as if she had transformed into an ordinary girl.
In the rising morning sun, their figures gradually turned into particles of light and dispersed.
"We'll leave our story to you. We hope you like it. Goodbye."
Facing the rising sun, the girl smiled blissfully, holding her younger sister as they slowly dissipated into the sunlight.
The still-present barrier emitted gentle fluctuations, and an illusion appeared in everyone's minds.
The Onoyama Family's ancestors included a Jujutsu Sorcerer, which allowed them to briefly become nobles.
However, after that Jujutsu Sorcerer's death, the Onoyama Family failed to produce another Jujutsu Sorcerer for several generations, so their glory came and went quickly.
Fortunately, their ancestor had left behind considerable wealth, which ensured the Onoyama Family never worried about food or drink.
Then everything changed fifty years ago.
The younger sister was lured away and murdered by a neighbor on her way home from school.
That night, the police and the father found the neighbor's house based on clues provided by the neighbors and traces left by the younger sister.
However, what the father found was only the younger sister's body, hacked into several pieces by the neighbor's axe.
Upon hearing the news, the mother suffered a mental breakdown, falling into madness as she looked at her daughter's corpse.
The father and older sister were also in great pain.
Later, the mother recalled the Family records passed down in the Onoyama Family, which documented that their ancestor had obtained a jar containing a Sealed Demon Spirit from the Eastern Great Country.
Legend had it that the demon would grant people's wishes and take the wish-maker's Soul as payment after the wish was fulfilled.
With only a partial understanding of Jujutsu and Cursed Spirits, she, clinging to her last hope, tore open the Seal on the jar, intending to sacrifice herself to bring her daughter back to life.
Feeling the gradually chilling environment, the mother, unable to see the Cursed Spirit, brought her younger sister's corpse, who had died yesterday, and made a wish to the demon.
Subsequently, the mother died blissfully in an illusion created by the demon, and the father, who arrived upon hearing the news to stop her, also could not escape the fate of death.
Then the Demon Spirit turned its gaze to the younger sister's corpse, whose Soul had not yet dissipated.
It wanted to devour the younger sister's Soul as well.
The Onoyama sisters possessed the talent of a Jujutsu Sorcerer, but the Onoyama Family had only ever produced one Jujutsu Sorcerer, and no systematic Legacy was left behind.
This meant they did not discover the sisters' talent.
The older sister, who arrived a step later than her father due to her small strides, saw her entire Family lying on the ground, and the immense shock she experienced caused her to Awaken her Technique—the "Incredible Game."
The Technique's effect was to deploy a barrier within which the caster could set game rules, and those inside the barrier could not violate these rules.
Once rules were set, they would not take effect immediately but required a certain amount of time.
Rules that directly caused harm to people could not be set.
The barrier released by the newly Awakened girl was only the size of a room.
The commotion caused by the older sister attracted the Demon Spirit's attention, and it shifted its gaze to her.
As if it had seen more delicious food, the Demon Spirit began to move towards the older sister.
Due to both fear and the weakness caused by her recent use of the Technique, the immobile older sister could only watch in horror as the Demon Spirit slowly walked towards her.
Fortunately, the demon's unhurried movements allowed the older sister's Technique rules to take effect.
The older sister, who didn't know how to set rules, was consumed by the thought of saving her younger sister.
The barrier generated by the Technique automatically created relevant rules based on the older sister's wish, and the Cursed Energy from the older sister was continuously extracted and injected into the younger sister's body.
The younger sister's body began to slowly recover, and her Soul, awakened by the Demon Spirit, also regained consciousness.
Perhaps due to the mysterious connection between twins, under the circumstances of the older sister's Awakening and the injection of a large amount of Cursed Energy, the younger sister also Awakened her own Technique—a Technique that allowed her to create and recall Clones.
When a Clone was recalled, anything touched and enveloped by its Cursed Energy would also be recalled with it.
The younger sister, having Awakened her Technique, summoned a Clone and pushed her older sister away before she could be eaten, allowing her Clone to be devoured instead.
The older sister was hidden behind a pile of junk by another Clone.
The Demon Spirit swallowed the Clone filled with the older sister's Cursed Energy. The older sister also gradually died due to excessive Cursed Energy depletion from her unfamiliar use of the Technique.
The Demon Spirit felt something was amiss, but the older sister's aura had disappeared, and it had indeed eaten something with the older sister's Cursed Energy. Finally, it gave up thinking and turned to swallow the younger sister's Soul.
The Demon Spirit was very satisfied with the newly enslaved Soul; this Soul was powerful and had even Awakened a Technique.
Subsequently, the Demon Spirit released the younger sister's Soul. Under the Demon Spirit's curse, the younger sister's Soul transformed into the Cursed Spirit, Crimson Being.
After giving the Crimson Being the command to hunt for it, the Demon Spirit transformed into a black mist, merged into the Crimson Being's body, and continued its slumber.
If a Jujutsu Sorcerer's body is not properly handled after death, it can easily generate Cursed Spirits.
Therefore, a Jujutsu Sorcerer's death must be killed or handled with Jujutsu.
The older sister died from over-exertion of Cursed Energy and life force, but the effect of her Technique still persisted, coupled with her obsession with her younger sister at the time of her death.
The older sister, as expected, turned into a Cursed Spirit.
"Younger sister, younger sister, younger sister," the Cursed Spirit older sister continuously murmured.
"What is a younger sister? What is a younger sister?"
The Cursed Spirit older sister began to feel confused. Under constant questioning, appropriate "rules" were generated by the barrier, and the Cursed Spirit older sister gradually regained her sanity with the help of the Technique.
Over the next decade or so, the Crimson Being killed and helped the Demon Spirit enslave nearly a hundred Souls, and the Cursed Spirit older sister continuously pursued the Crimson Being, hoping to free her younger sister.
Gradually, the older sister discovered that the Demon Spirit was almost always asleep, and what it needed was a large amount of negative emotions, not human lives.
After this, the older sister began to use the barrier generated by her Technique to influence her younger sister's actions.
After continuous attempts, this game of finding a body emerged.
Before her death, the younger sister's body was cut into several pieces by the neighbor, so a complete body was the younger sister's obsession. Using this as the game's content could easily influence the Crimson Being, into which the younger sister had transformed.
Schools are densely populated, and the emotions of Young Men are extremely rich. Here, enough negative emotions could be collected to provide to the Demon Spirit, allowing it to remain asleep.
The older sister also gradually perfected this incredible game, ensuring that people killed within the barrier would not truly die, and those who completed the game would eventually have their memories of this period blurred, believing they had only had a nightmare.
In the more than thirty years since this game appeared, almost no one had been truly killed by the Crimson Being.
Thus, the older sister successfully confined her younger sister to the school, providing enough negative emotions to keep the Demon Spirit asleep while searching for a way to rescue her younger sister, until the arrival of Eichi and Geto.