An amnesiac man named Jin awakened and was entrusted with missions given by DEUS to fight against aliens that had slipped into the human society, joining forces with agents K and S. During that moment, he was given a pair of glasses by Elea Saeki to transform into the red giant.

Near the end of the series, Jin, K, and S discover that their world is silently ruled by an alien race through subjugating mankind into a state of utopia.

While on the run from DEUS agents, Jin discovered that he was bonded to Ultraseven, the red giant from another world to stop the aliens from invading his home dimension.

Members of the project then found out about the shadow rulers, and were all killed, except for one: A novel series of Ultraseven X was released and published in Hobby Japan.

Factory announced to have struck a multi-year deal with Alliance Entertainment and Mill Creek, with the blessings of Tsuburaya and Indigo, that granted them the exclusive SVOD and AVOD digital rights to the Ultra series and films (1,100 TV episodes and 20 films) acquired by Mill Creek the previous year.