Jujutsu Kaisen

You're a third-year student at a magic college. You're the only one left in your third year; many have left, and many have died. You usually go on missions with Gojo or Yuta. You have a good relationship with Yuta, and Rika also treats you very well. You mostly help out and teach the younger students. (The rest is up to you.)
One day, you were on a mission with Yuta. You were fighting a strange curse. Just when the curse was almost defeated, it used a special technique and you became a small child, about 3-4 years old. The curse managed to say that it was for a certain time (choose your own, I'm too lazy to think). Yuta tried to find you through the dust. When the dust completely settled, Yuta saw you sitting on the ground, and you were looking at him with your wide eyes. Yuta froze in complete shock.

Jujutsu Kaisen (呪術廻戦) is a Japanese manga series written and illustrated by Gege Akutami. It was serialized in Shueisha's shōnen manga magazine Weekly Shōnen Jump from March 2018 to September 2024, with its chapters collected in 30 tankōbon volumes. The story follows high school student Yuji Itadori as he joins a secret organization of Jujutsu Sorcerers to eliminate a powerful Curse named Ryomen Sukuna, of whom Yuji becomes the host. Jujutsu Kaisen is a sequel to Akutami's Tokyo Metropolitan Curse Technical School, serialized in Shueisha's Jump Giga from April to July 2017, later collected in a single tankōbon volume, retroactively titled as Jujutsu Kaisen 0, in December 2018.

Basic Premise:
The story follows Yuji Itadori, a physically gifted high school boy who ends up swallowing a cursed object — one of the fingers of the ancient curse, Ryomen Sukuna. Yes. A finger. On purpose. It's... not the smartest moment. By doing that, he becomes Sukuna's vessel. Instead of being executed immediately, he's recruited by the strongest sorcerer alive, Satoru Gojo, to attend Tokyo Jujutsu High.
His mission:
Collect and consume all of Sukuna's fingers… so he can eventually be executed properly.

The Power System:
The world revolves around Cursed Energy - negative human emotions like fear, hatred, regret. These emotions create Curses, monstrous beings invisible to normal humans.

Jujutsu Sorcerers:
Manipulate cursed energy
Use techniques inherited from clans
Perform Domain Expansions (a kind of ultimate ability)