How to Find the Brain That Ran Away from Home

Itadori Yukina used to be the body of Brain.

In her previous life, Brain abandoned her. In this life, she was born with a sick brain. Unless she gets a brain transplant, she won't live to see eighteen.

But as long as she finds Brain, she can survive.

So she starts spreading wild rumors all over Jujutsu High.

To Tengen:

"Do you know why Brain wants your body?"

Tengen: "To merge with a hundred million people."

Itadori Yukina: "NO! He's secretly in love with you! He fantasized about you while staring at your portrait. He's such a pervert!"

Tengen: !!!

To Gojo:

"Do you know why Brain is targeting you?"

Gojo: "Because I'm too strong."

Itadori Yukina: "No. He wants a pair of 24-karat, titanium-alloy, all-seeing eyes, but he doesn't have any. He's jealous and resentful, and swore to kill every Six Eyes user in the world!"

Gojo: ???

To Sukuna:

"Do you know why Brain wants to become your ally?"

Sukuna: "For his own benefit."

Itadori Yukina: "No. He's fallen for your body! He wants a child who shares your blood! He's intersex and goes for men and women alike!"

Sukuna: ???

Brain, after hearing all the rumors: [Old man staring at phone meme]

Brain finds Itadori Yukina, the one spreading all the rumors. She grabs his hand and demands that they become one.

Brain: "I refuse."

Itadori Yukina: "Why? Because I don't have that thing down there anymore?"

Brain: "..."

Itadori Yukina: "It's fine! Just because you couldn't do it before doesn't mean you can't now. Modern medicine is very advanced."

Brain: "Shut up!!!"

Reading Guide:

1. Selfcest + lots of flashbacks, including both the male and female leads' perspectives.

2. OOC warning. There are tons of headcanons.

3. If you feel uncomfortable, please stop reading.

Theme: Fight against fate to the very end