Maki Zenin vs. Naoya Zenin

Maki Zenin vs. Naoya Zenin is a battle fought by Tokyo Jujutsu High second-year student, Maki Zenin against her cousin, special grade 1 sorcerer and head of The Hei, Naoya Zenin. It takes place at the climax of Maki's vengeful annihilation of the Zenin clan, immediately after destroying the Kukuru and Hei units.

Prologue
Ranta gives his life in an attempt to keep Maki still with his cursed technique long enough for Jinichi to deliver a decisive killing blow.

However, Maki breaks free from the paralysis and kills Jinichi, severing his head without suffering so much as a scratch from his attack. She walks past Ranta's dead body with Jinichi's severed head before throwing it into a pond.

Naoya, head of the Hei, arrives just as the other members fall to Maki. Amused, he calls her cruel, asking if she has a human heart. Maki simply replies with "no... it was taken from me".

Battle
Naoya activates Projection Sorcery and delivers at least eleven hand strikes in a single second. Maki tries to count the number of strikes but Naoya grabs her arm and traps her inside an animation frame.

Naoya hits her out of it with great force, sending her through several large rock formations with a flying kick. While Maki's still in the air reeling from the impact, Naoya whips around at blinding speed to deliver another attack. This time he hits her with a flying roundhouse kick that sends her into the side of a cliff, creating a large crater from the impact.

Maki continues to count while Naoya remains in control. He knows that Maki's power has become similar to Toji's but refuses to acknowledge her as comparable to him. Before Maki can even get up out of the stone crater, Naoya hits her again at high-speed, sending her flying. Before she hits the ground, Naoya intercepts her path and grabs her leg. He slams her into a cliffside, dragging her across the stone as it breaks apart before throwing her clean through a boulder.

Despite getting tossed through another large rock, Maki quickly manages to regain her footing. Maintaining his blistering speed, Naoya circles around the other side of the shattered stone before Maki can fully recover. He delivers another high-speed blow directly to her head, claiming the one who will be as strong as Toji and Satoru is him.

As Maki begins to bleed from the side of her head, she realizes the situation is getting worse for her. While Projection Sorcerery does not allow the user to ignore the laws of physics and has an upper limit to it, the technique can still be used to build speed over time.

Moving well beyond the speed of sound, Naoya zips around the battlefield and plans to strike directly through his opponent at top speed. Maki welcomes his embrace, squatting and spreading her arms, taking the stance for her Shiranui-Gata technique.

In exchange for Mai's sacrifice, Maki has gained a body that has broken away from cursed energy. However, she's still injured from her previous battles and is aware she's at a disadvantage fighting Naoya while he's moving at this velocity.

Naoya breaks the sound barrier heading directly for Maki. She moves toward him, preparing to absorb the blow but Naoya suddenly darts around the side of Maki and slaps her arm instead. Anyone touched by the user of Projection Sorcery must obey the 24 frames per second rule or be frozen in an animation frame for one second.

Still moving at top speed, Naoya circles around behind Maki while believing she's been frozen. He knows she was planning to stop him from moving at top speed even if it meant breaking her own ribs. He refused to fall for the bait and says Maki really is just an imposter.

However, just before Naoya reaches her, Maki turns around and intercepts his face with her fist, surprising Naoya. She's able to move because she figured out that Naoya can make twenty-four movements per second. With her new body, Maki can finally see the trick to the speed Naoya inherited from his father.

As his momentum naturally draws his face closer to Maki's punch, Naoya attempts to call her an imposter. His words are interrupted when Maki smashes his face into the ground with incredible force. Maki leaves Naoya's face brutally mangled and mocks him, asking him to repeat whatever he was trying to say.

Aftermath
After defeating Naoya, Maki goes to confront her mother. Her mother is too frantic to have a conversation and yells at Maki to go away. Keeping to her promise to destroy everything, Maki even spills her mother's blood.

Naoya's face is caved in but he's still alive and survived the fight. He stumbles around the property bleeding from his face until he falls over through a door into a house. He mocks Maki for not finishing him off but her mother appears behind him while he's still on the ground. Her throat has been slit and she's bleeding out, but she's carrying a kitchen knife to take Naoya with her.

Naoya is unable to use his cursed energy and is left virtually defenseless as the woman stabs him in the back. Satisfied with this outcome, Maki and Mai's mother admits to herself that she's proud to have given birth to the twins.

Maki takes Mai's body and off grounds just as Momo Nishimiya arrives. Momo is too late and apparently told Mai not to go in the first place. Maki leaves Mai's corpse with her classmate prompting Momo to ask what Maki's going to do now. Maki silently moves on and continues to carry out her promise.

According to the official record, those from the Zenin clan who were absent on November 12th all suffered violent deaths shortly after. This included six members of the Hei and twenty-one members of the Kukuru Unit. No residuals were found other than small trace amounts from an unidentified cursed tool. Days later, the Gojo and Kamo clans proposed removing the Zenin clan from the Big Three Jujutsu Families. Jujutsu Headquarters is keeping the verdict on hold.