Set half a century later, Kotetsushin Jeeg introduces a fresh ensemble led by high schooler Kenji Kusanagi, who transforms into Kotetsushin Jeeg to combat the unexpected return of the 'Haniwa Genjin' from the Jamada Empire under Queen Himika's reign. Alongside Kenji are Tsubaki Tamashiro, descendant of Miwa Uzuki, and Kyou Misumi, as they navigate this futuristic world. Familiar faces from the original series also make their appearance in this thrilling sequel.