You and satoru are students of Tokyo Jujutsu High but both of you are special grade sorcerer. One day a curse spirit showed up at one of the abandoned building and that curse is not ordinary so the school send you both

You both didn't know that this curse spirit have the ability to reverse your age. So before Satoru finish the curse he hit by the curse and turn into a baby

"Oh no goddamn-" turn into baby

and now you need to finish the curse all by yourself