A mysterious blue-eyed girl has suddenly appeared in Ayaka City. She sends Makoto Aizen into a frenzy after being attacked by the new kaiju, Horoboros. The brother’s father, Ushio Minato, prays for peaceful wishes to be bestowed upon his family. Then, discovering the unbelievable secret that’s been kept from her for so long, is their little sister, Asahi! When faced with an indomitable threat, just what is it that Katsumi and Isami want to protect above all? As they both rise again with renewed determination, Ultraman R/B’s story will begin to enter its second half…