Located at the end of the world, the Kingdom of Ozmargo is inhabited by beasts of all shapes and forms, ruled by a fearsome nameless king. After a hundred-year war between Ozmargo and the neighboring human kingdom ended, a peace treaty was signed: every year, a sacrifice must be sent to be devoured by the king on the night of revelation. Sariphi is the 99th and latest human sacrifice. Although frail-looking, she neither fears the king nor has a family or home to return to should she manage to escape from her impending demise. Intrigued by the audacious girl, the king lets Sariphi roam around the palace despite the disapproval of his advisor, Anubis. Little by little, the king and Sariphi begin to warm up to each other, but the night of revelation is fast approaching. Unbeknownst to them, the fateful day unleashes a series of events that will change the course of destiny of not only Sariphi and the king but also of their respective worlds.

Ranma and the gang are invited to a boating trip with Kuno. Unfortunately, a storm destroys the yacht and everyone is stranded on a remote island. The whole situation goes even more awry when one by one, the girls disappear without a trace. Ranma then finds out that the girls are abducted by Toma, ruler of the island, as part of his personal harem.

When he was a young boy, Afro witnessed his father be cut down in a duel at the hands of a man known only as Justice. After taking the life of Afro's father, Justice cast aside his Number Two headband and took the Number One to claim its godly powers as his own. Years later, having obtained the Number Two headband which grants him the right to challenge the Number One, Afro moves forward in his hunt for revenge on the man who murdered his father. There is just one thing that stands in his way—everyone else in the world! Though the Number One can only be challenged by the Number Two, the Number Two can be challenged by anyone. As his enemies gather to try and take the title of Number Two, Afro must fight through a myriad of foes and obstacles if he hopes to reach the Number One and claim vengeance once and for all. [Written by MAL Rewrite]

After their world was saved by Gridman and Akane Shinjo returned to the real world, Yūta, Rikka, and Utsumi return to their normal lives, though Yūta still has to adjust to losing two months of his memories due to being possessed by Gridman during that time. Rikka and Utsumi work on writing a script for a play their class will perform in the upcoming school festival based on their experiences with Gridman, while Yūta tries to work up the courage to confess his feelings to Rikka. However, their life is disrupted when a kaiju suddenly attacks the city. Yūta voluntarily fuses with Gridman again to fight the kaiju, and is assisted by the return of the Neon Genesis Junior High Students, who now count a newly revived Gauma who commands DynaRex as their newest member. Gridman and the NGJHS defeat the kaiju, and explain that some unknown phenomenon is causing different universes to overlap in a potential Big Crunch.