The series is loosely based on the Japanese folktale of Momotarō and the heroes fight monsters whose designs pay tribute to previous installments of the franchise.

21 years later, mysterious monsters called the Hitotsuki begin appearing when humans overcome with their inner desires are taken over by the spirits infused with powers related to the Super Sentai of the past.

Taro, and four other individuals selected by Jin; Shinichi Saruhara, a smart but eccentric young man, Haruka Kitou, a high schooler manga artist, Tsubasa Inuzuka, a wanted fugitive, and Tsuyoshi Kijino, an ordinary salaryman; begin fighting the Hitotsuki and saving their hosts as the Donbrothers.

The Donbrothers also count on the help of Kaito Goshikida, the owner of the coffee shop Donbura who transforms into Zenkaizer Black, and Jin, who is trapped in a virtual prison and occasionally offers them advice.

The trademark for the series was filed by Toei Company on October 18, 2021,[3][4] while the cast and staff was officially announced on February 9, 2022, with Toshiki Inoue as main writer.

Shirakura added that the design of Don Onitaijin was decided as a sort of "revenge" when Zenkaiger's failed attempt to keep up with Bandai's toy release schedule.