After his best friend gave him the ultimate gift, an eternal slumber, Geto honestly went straight to hell.
To keep spying on his best friend, Geto worked tirelessly and put on a good show until he finally earned the appreciation of Hell's deputy chief. He became the man's right-hand man, and thus began his life as a low-ranking underworld employee: working, slacking off, and secretly using the Pure Glass Mirror, a device used in Hell to view the mortal world, to catch up on anime.
What he never expected was that his life in Hell would go smoothly, while the anime he was following kept heading further and further down the road to hell.
Trusting deeply in his best friend, he suppressed the urge to storm the gates of Hell, guarded by the Ox-Head and Horse-Face demons, and gritted his teeth as he watched.
Even when his best friend was exploited by the old geezers of the Higher-Ups, swarmed by curses, stuffed into a cat carrier by a brain wearing his own skin, and forced to face a thousand-year-old zombie alone under the expectations of the entire jujutsu world, Geto gritted his teeth and kept watching.
Until his best friend was cut in half by Sukuna, denied even a peaceful death, and had his corpse used by his students to gang up on Sukuna...
Geto watched the story's ending without changing expression, crushed the remote in his hand, and punched through the TV screen.
The consequence of casually destroying public property in Hell was that, the next second, Geto's soul was sucked into the shattered Pure Glass Mirror, and everything went black.
When he woke again, Geto was stunned to discover that his soul had returned to the time before the Night Parade of a Hundred Demons.
The jujutsu world was already roiling beneath the surface. The Higher-Ups had long been fed up with Gojo-sensei, the strongest, while in the shadows, a disgusting brain was plotting to seal him, revive Sukuna, and destroy the jujutsu world.
But when Geto, already traumatized by the previous life's story, saw his former self, the head of the Star Religious Group, who knew nothing of this and wanted only the eternal peace his best friend would give him, he decided to wreck everyone's lives. He drew stitches on his own forehead and climbed into a dump truck.
The brain was covertly eyeing his corpse? Geto put on a nurse's uniform, topped it off with a stitched forehead, and went on a variety show in his original skin to show himself off from every angle!
The brain wanted to manipulate everything from the shadows? Geto took over the body the brain had abandoned and stabbed him in the back!
The brain's technique could fool the Six Eyes? Geto pointed at the stitches on his head and smiled at Gojo-sensei. "Just look for my scars."
The brain wanted to seal the Six Eyes? Geto struck once, launched himself into the air, and successfully circled around to knock the brain's skull off, then tossed that toothy lump of a brain into the Prison Realm.
"Once you're in there, I'll be the only brain around. I'll carry on everything you've done, Brain-chan."
Geto waved cheerfully at the imprisoned brain.
Taking advantage of his brain disguise, Geto spent every day wrecking someone's life, then someone else's, living as freely and carefree as he pleased.
Still, he couldn't figure out why the Six Eyes, which shouldn't have been able to recognize the brain, always managed to pick him out of the two of them with perfect accuracy.
"What's so strange about that?" the person in question said. "It's just that Suguru is Suguru."
"Even without the Six Eyes, I'd recognize Suguru."
Gojo x Geto. A story about Geto stealing the brain's body and saving the jujutsu world with a dump truck.
There will probably be lots of Jujutsu references. Probably.
Lots of OOC. Beware.
Theme: Never give up on living well.