My Jujutsu Kaisen Is Different

Yu Shenyang is an ordinary person who can really fight, and he was in the same year as Gojo at Jujutsu High. To stop Geto from dying, he is struck by a jujutsu backlash and shrinks into a ten-year-old brat. Yuji Itadori finds him and takes him home. With the soul of a mature seventeen-year-old high school boy, he decides to protect his defenseless, clueless little brother. But in his first timeline, he dies during the Shibuya Incident. He doesn't know what caused him to end up in a second timeline, but this time, he has to change that future, no matter what! P.S. OOC warning. The tone changes suddenly. Written in a burst of enthusiasm, purely to kick the bucket. The plot has been heavily modified, with original elements (official face-slapping). Everyone survives (Brain and Mahito can go die). Pairing undecided. Feel free to place your bets (maybe it'll be decided in an extra). The protagonist is overpowered, strong and tragic... maybe? I just want to write a happy story about sweet romance where all the villains disappear :) Theme: You can lose the team battle, but you have to kick the bucket