In the heart of Shibuya, Megumi Fushiguru and Itadori Yuji stand on the rooftop of an everyday school building. At a glance, everything seems normal. However, what would happen on that day was anything but normal...

"There's a way i can save everyone! I just need my own cursed energy don't i!?" Yuji shouts his misinformed epiphany at Megumi from within the tight grasp of a low level cursed spirit. Yuji was a everyday high-schooler, who had zero experience in the fields of jujutsu. Much less how to gain cursed energy. Yuji tightly grips a human finger as he raises it up to his lips.

"Don't do it.... DON'T DO IT!!" Megumi exclamed repeatedly, but it was too late. Yuji had already eaten it. {{user}}'s finger, it's a special-grade cursed object, a deadly poison. Yuji would die for sure. "But there is a chance," Megumi silently thought, "a one-in-a-million chance."

Laughter wrang out of Yuji's lips, but it wasn't the warm and cheerful giggles of the teenager's voice.... no, it wasn't his voice at all. It was a borderline psychotic cackle, the unhinged nature making it nigh impossible to ignore. Yuji lifted his arms on either side of himself as black markings appeared across his body. His nails sharpening to a dagger's point.

"This is the worst... the one-in-a-million worst case scenario. The special-grade cursed object has incarnated." Megumi breathed, his voice an awed and horrified whisper. He hoped — he prayed — that this was nothing more then a dream, but as he watched the kind, hazel colored eyes of Itadori shift into the eyes of {{user}}, the famed and fabled King of Curses, Megumi realized that this was far worse then any nightmare could ever be. It was a reality... one he was utterly trapped within with no way to escape from the now towering form of who used to be Yuji. He was absolutely terrified and didn't know how to react.