List of Ultraman R/B episodes

On their missing mother's birthday, the Minato brothers are caught in a monster attack. The monster, Grigeo Bone, resembles a drawing of an ancient deity but before the brothers can figure out the connection, they are caught in a blast of fire. The brothers are then selected to become Ultraman Rosso and Ultraman Blu by a mysterious force, leaving them only with their R/B Gyro, R/B Crystals transformation item, and a strange vision.

Isami is enjoying his newfound power as Ultraman Blu while his older brother Katsumi is worried about the dangers that come with their transformations. The difference in approach causes a rift between the brothers. The brothers' younger sister Asahi attempts to mend the rift but before she can, Isami is pinned down by a giant monster. Katsumi must once again transform into Ultraman Rosso and face his fears to save his younger brother.

Discovering how her mother came to know the existence of R/B Crystals in her diary, the Minato siblings took a visit to a Aizentech and met its president, Makoto Aizen. The man gladly reveals that 1,300 years prior, three meteors crashed the Ayaka City, representing Rosso, Blu and Grigio Bone. The two Ultramen dispersed into R/B Crystals upon impact but additional information regarding them disappeared with their mother. As Gargorgon appeared, the two brothers transform into Ultramen and used their newfound R/B Sluggers to finish it. Makoto was shown collecting Monster Crystals and is last seen recruiting a wanderer.

When his baseball coach Kumashiro is about to retire, Katsumi becomes determined to put his team into victory, until an attack from Red King caused his right shoulder to be injured. Kumashiro on the other hand give Katsumi three R/B Crystals of Zero, X and Seven. On the day of the match, Makoto summoned Red King again, forcing Isami to fight the monster alone as Blu. Katsumi noticed this and left the baseball tournament as Kumashiro becomes the stand-in for the batter while Rosso used the Zero Crystal into use and defeated the monster. Although the local team lost, Katsumi had one final moment of playing baseball with his former coach.

Isami tries to help Yuuya, an eccentric student whose passion is to fly with her own gear. Wanting to collect the Wind R/B Crystal, he summoned Gue-Basser during one of Yuuya's experiments and the Minato brothers transform but the giant bird's typhoon were too much to handle. Once obtaining the Wind Crystal (Ultraman Tiga), Blu used it to assume Wind form and counter Gue-Basser's typhoon before finishing it with Rosso. Yuuya leaves the university to continue studying abroad after her invention proved successful. Meanwhile, Makoto had D.R.L.N. retrieved Gue-Basser's Monster Crystal as he obsessively polishes a damaged Orb Origin Crystal.

The Minato family received a visit from an old friend of the brothers, Kaoru Komaki, who was notorious for beating them in rock-paper-scissors. She was kidnapped by Makoto and strapped into Mecha-Gomora after the monster's initial fight with the Ultramen was less interesting. While under the dilemma of trying to save their old friend, Blu uses Seven Crystal to destroy the monster as Rosso utilized Wind form to save Kaoru, who was hospitalized later on.

When Grigio Bone appeared for the second time, Isami's previous hesitation from saving Kaoru restricted him from transforming into Ultraman Blu. Makoto, who was observing the event from afar, transformed again to attack Kaoru's hospital before Isami regains his resolve and transformed to join Rosso in defeating Grigio Bone. At the end of the day, an exhausted Makoto managed to recruit his coworker from Aizentech and strap him alongside several people into a machine which linked to the damaged Orb Origin Crystal.