Jin Momoi finds a baby inside a peach-shaped capsule and takes the child with him. 21 years later, high schooler and manga artist Haruka Kitou is accused of being a plagiarist as she mysteriously obtains yellow sunglasses and is chosen to become Oni Sister. Jin reveals to Haruka that she's been decided to fight monsters known as the Nouto from attacking the city. She learns that as a result of becoming Oni Sister, she has joined the Donbrothers. Along the way, she meets fellow members Kiji Broth
Haruka is instructed by Jin to look for his son, Taro, in order to bring her life back to normal and starts working under Kaito Goshikida at the Donbura café. Meanwhile, Taro is in trouble when one of his co-workers turns into a monstrous Hitotsuki out of her desire to become younger. Leading Haruka to meet another member named Inu Brother. *This episode is a tribute to Ressha Sentai ToQger.
Haruka joins forces with Taro and Shinichi Saruhara, unaware of their identities as Don Momotaro and Saru Brother, to investigate a mysterious thief who steals the lamps of his victims' houses. Reunited for the first time, the Donbrothers encounter Sononi, another member of the Nouto. *This episode is a tribute to the Lupinrangers from Kaitou Sentai Lupinranger VS Keisatsu Sentai Patranger.
With Shirokuma Express temporary closed, Taro begins working a part-time job at the company where Tsuyoshi Kijino works, unaware of his secret identity as Kiji Brother until both must fight a Hitotsuki who is obsessed with rice balls. *This episode is a tribute to Chouriki Sentai Ohranger.
Tsubasa Inuzuka is a fugitive from justice who claims he is innocent. While fleeing from the police, Tsubasa accidentally stumbles on Taro, Shinichi, Haruka, and Tsuyoshi, who are unaware that he is Inu Brother, one of their companions. *This episode is a tribute to the Patrangers from Kaitou Sentai Lupinranger VS Keisatsu Sentai Patranger.
Tsuyoshi is in fear of not being a suitable man to his wife, a well known beautician. After being encouraged by Kaito, he decides to do something about it and challenges Taro in order to prove himself. *This episode is a tribute to Doubutsu Sentai Zyuohger.
Shinichi and Taro pay a visit to Haruka's school as special guest teachers when the principal turns into a Hitotsuki and attacks the students. *This episode is a tribute to Chikyuu Sentai Fiveman.
Tsuyoshi and Tsubasa meet by coincidence, the two unaware of each other's identities as Donbrothers and the striking resemblance between Tsuyoshi's wife, Miho, and Tsubasa's beloved, Natsumi. Meanwhile, Taro encounters Sonoi, the leader of the Nouto, also unaware that they are enemies. *This episode is a tribute to Mashin Sentai Kiramager.
Taro is struck with a mysterious condition that rends him lethargic. As Haruka and Shinichi look for a way to cure him, Kaito joins the Donbrothers in battle, revealing his secret identity as Zenkaizer Black. *This episode is a tribute to Tokumei Sentai Go-Busters.
Haruka obtains enough Kibi-Points to leave the Donbrothers and restore her reputation as a manga artist, but she feels uneasy when her former companions face another Hitotsuki, accompanied by her replacement Marina Maeda, a photographer who is struggling through the same predicaments as she did. *This episode is a tribute to Kaizoku Sentai Gokaiger.
A man obsessed with becoming a ninja transforms into a Hitotsuki and attacks Taro while Tsubasa gets sick and the other Donbrothers take care of him. Meanwhile, the Nouto consult with Jin about a new type of monster that poses an even bigger threat. *This episode is a tribute to Shuriken Sentai Ninninger.
Kirara Kira, an aspiring idol, begins working part-time at Donbura when an obsessed fan turns into a Hitotsuki and attacks her. Meanwhile, a worried Taro has another meeting with Sonoi, who provides him with advice. *This episode is a tribute to Uchu Sentai Kyuranger.
Fed up with Taro's behavior, the other Donbrothers decide to stop fighting alongside him. Meanwhile, Sonoi discovers Taro's real identity and is ordered to kill him. *This episode is a tribute to Zyuden Sentai Kyoryuger.
The other Donbrothers look for a way to bring Taro back, while Jiro Momotani, another individual whose dream is to become a hero, appears before them. *This episode is a tribute to Kousoku Sentai Turboranger.
While Haruka and Shinichi are crippled from their failed attempt to revive Taro and Tsuyoshi transforms into a Hitotsuki, Jiro obtains the power to transform into a Donbrother as well to help set things straight. *This episode is a tribute to Gekisou Sentai Carranger and take place before the events of Avataro Sentai Donbrothers Meets Senpaiger.
Jiro tries his best to appease the other Donbrothers, but their annoyance with his meddling causes him to show a more dangerous side of himself. *This episode is a tribute to Kyoryu Sentai Zyuranger and take place after the events of Avataro Sentai Donbrothers Meets Senpaiger.
One year has passed since Tsubasa made his promise to Natsumi and Tsubasa believes that soon he will reunite with her, but instead, he meets a young heartbroken man who is about to turn into a Hitotsuki. *This episode is a tribute to Choujin Sentai Jetman.
Jiro has a contest with Taro to prove that he is on the same level as him, and upon knowing of this, Haruka, Shinichi and Tsuyoshi decide to join in. Meanwhile, Don Murasame, a new enemy appears before the Donbrothers.
Haruka meets a ghost who can't get to the afterlife because she is waiting for a call from the person she loves, while the Donbrothers face an enemy who has no corporeal form. *This episode is a tribute to Engine Sentai Go-Onger.
For the sake of Jiro's childhood friend Rumi, Taro temporarily leaves the Donbrothers and puts Jiro in charge of the team, but Jiro gets carried away and brings trouble to the others, while the Nouto are scouted to participate in a film. *This episode is a tribute to Gosei Sentai Dairanger and take place before the events of Avataro Sentai Donbrothers the Movie: New First Love Hero.
Shinichi encounters a man called "Shirai", who claims to be the previous Saru Brother. Meanwhile, Haruka is captured by Sonoza, the third member of the Nouto who wants her to continue her manga. *This episode is a tribute to Samurai Sentai Shinkenger and take place after the events of Avataro Sentai Donbrothers the Movie: New First Love Hero.
Unable to comply with Sonoza's demands regarding her manga, Haruka decides to look for the mangaka who accused her of plagiarism in the first place. Meanwhile, Jiro returns to the countryside to make a visit to his friends. *This episode is a tribute to Denji Sentai Megaranger.
An accident makes Tsubasa trapped in his Inu Brother form and he gets into a series of misadventures. One member short, the Donbrothers have some difficulty fighting the Hitotsuki, when Jiro unlocks a new power within him. *This episode is a tribute to Juken Sentai Gekiranger.
Taro meets a mother who mistakes him for his missing son. Shinichi asks Taro to pass as her son in order to cheer her up, but Taro's incapable of lying and he comes with a plan. *This episode is a tribute to Ninja Sentai Kakuranger.
Tsuyoshi is fired and too ashamed to tell Miho about it, begins working hard on part-time jobs to make ends meet, but he gets too tired to fight as a Donbrother and Taro decides to lend him a hand. *This episode is a tribute to Dai Sentai Goggle V.
After watching the final episode of Kamen Rider Revice, Kaito assembles the Donbrothers and holds a meeting to decide who among them had contributed most to the team so far, while reminiscing about their past battles. *This episode is a tribute to Kamen Rider Revice.
Taro and Sonoi have a duel to settle their score once and for all, but their match is interrupted by a sudden attack from the Juto and a man they previously saved who turned into a Hitotsuki again. *This episode is a tribute to Mahou Sentai Magiranger.
A woman approaches Tsubasa and enlists his help to steal a painting. Realizing that there is more in her story that it seems, Tsubasa agrees to help her. However, Haruka and Tsuyoshi also intend to acquire the painting for their own reasons. *This episode is a tribute to Kagaku Sentai Dynaman.
Taro receives a funeral notice for Sonoi from the Nouto Council. Taro, who decides to go alone, is invited to a different dimension, where he is surrounded by celestial maidens and receives hospitality such as baths, massages, and meals. Meanwhile, Don Murasame appears to help the Anoni, who is attacked by the Juto. Jiro tries to fight back, but the other Jiro and Murasame feel similar to each other... *This episode is a tribute to Bakuryuu Sentai Abaranger.
Haruka's aunt is kidnapped by the Anoni, who use her as a hostage to force the Donbrothers into an alliance with the Nouto to exterminate the Juto while Tsuyoshi is in denial over learning Miho's true identity as a Juto. *This episode is a tribute to Choushinsei Flashman.