[A self-indulgent story. Although Sukuna is in the title, the different endings have different pairing routes. In short, the motto is: everyone gets a turn!]
Ancient-era arc ★
Bad news: You transmigrate into the world of Jujutsu Kaisen.
Worse news: You transmigrate to a thousand years ago, an era crawling with curses and so desolate that even birds wouldn't shit there.
After years of scraping by, Kagamiya Sakura finally rose to the rank of “the strongest.” By then, Ryomen Sukuna was still a toddler (.)
What should you do with toddler Sukuna?
Strike while he's down and finish him off?
Of course not!
Kagamiya Sakura, a troublemaker who lives for fun, decides to take him in as a disciple and raise him into an even more terrifying Big Boss than in the original. Heh heh heh heh heh heh heh!
But what eventually teaches Ryomen Sukuna to love is...
Kagamiya Sakura: I may look young, but I'm actually much older than you...
Sukuna sneers: The ethics and morals the world follows have nothing to do with me.
Modern-era arc ★
After being reincarnated in the modern era, Kagamiya Sakura retains only her memories from before she transmigrated, with no recollection of her past from a thousand years ago.
It isn't until she enrolls at Jujutsu High and discovers that the Time Vessel Association's ultimate goal is to resurrect Kagamiya Sakura, the most evil Curse User of the Heian period, that she starts to feel that something is ever so slightly off.
White-haired man in sunglasses: Why does that super-evil Demon King have the same name as you? Hahahaha!
Weird-haired man: It's just a coincidence, right? It has to be!
Kagamiya Sakura: That most evil Curse User... might actually be me.
Theme: People should face their desires honestly
After I Was Picked Up by the Zoldycks
As a Female Supporting Character in an Explicit Western Fantasy Novel
A Teacher-Student Romance with Nezha
The Empress and Her Minister's Wife
Falling in Love with an Angel
If I Can't Be a Pokémon Trainer, I'll Have to Raise Spirit Beasts
My Nen Ability Is the Siren's Kiss