The three siblings visit the passionate Makoto Aizen, president of AizenTech, a company located in Ayaka City and are enchanted by their displays of cutting-edge technology. It’s then revealed that the mother of the three siblings was once doing “specific research” for AizenTech. During their visit, a giant monster with the ability to turn items into stone attacks.

A true hero appears before the people in despair. His name is Ultraman Orb Dark Noir Black Schwarz. Besides that, Horoboros returns with an evolved power. How did it happen?

The colossal kaiju, Reugosite, is on his way towards Earth in attempts to destroy it all! The Minato brothers and their mother, Mio Minato, have managed to develop a way to contain Reugosite within a Crystal! Their strategy is successful, but as Mio prepares to send the Crystal into the other dimension, Saki Mitsurugi, who is after the complete annihilation of Reugosite, interferes! The two Ultra Brothers then declare that they will save both the Earth and Saki! Saki then transforms into a super armoured kaiju known as Grigio Regina, in order to fulfil her mission…