is a Japanese manga series written by Riku Sanjo and illustrated by Masaki Sato. It is a manga sequel to the tokusatsu live-action drama Kamen Rider W, which originally aired in 2009 as part of Toei Company's Kamen Rider franchise. It has been serialized in Shogakukan's Big Comic Spirits since August 2017, with its chapters collected in 14 tankōbon volumes as of April 2023.
An anime television series adaptation by Studio Kai, Toei, and Ishimori Entertainment aired from August to October 2022.
Plot
Taking place after Kamen Rider W Returns: Kamen Rider Accel, two years after the main TV series' finale, Fuuto PI sees the return of Shotaro Hidari, a private detective who works at Narumi Detective Agency, and his partner Raito "Philip" Sonozaki, the sole survivor of the Sonozaki family who can access the Gaia Library. Together they transform into Kamen Rider W, who protects the city of Fuuto from Dopants, monsters created by Gaia Memories. They solve cases alongside their boss Akiko Terui, who often joins their investigations with her husband Ryu (a member of the police force who is also Kamen Rider Accel).
One day, Shotaro encounters an amnesiac pink-haired girl named Tokime, who is being targeted by Dopants. After saving her, they decided to hire her at Narumi Detective Agency as their assistant. As Shotaro and Philip solve more cases, they gradually uncover Tokime's connection with the mysterious Aurora Dopant and her past life, along with the true potential of Gaia Memories' next stage used by Dopants in their human forms, dubbed High Dopes.
Characters
Main characters
Kamen Rider Double (alternatively Kamen Rider W) is the titular duo of Shotaro Hidari and Philip who can fuse with each other and transform via the Double Driver and their own set of purified Gaia Memories. Their individual Drivers are linked, such that Philip's consciousness is transferred into Shotaro's body along with the former's Gaia Memory. As such, Double's ability to function is dependent on the condition of its components, as any physical or mental disruption could affect Double's mobility or cancel the transformation entirely. Although Shotaro serves as the primary host body for Double, exceptions to these when using a Fang Memory to which Philip serves as host, while CycloneJoker Xtreme fuses both their bodies and souls into one. If either Double’s halves are unavailable each of Double’s halves can use Lost Drivers to transform into Kamen Rider Joker and Cyclone respective.
The man of the streets, a non-standard "hard-boiled private eye" who emulates famous pulp fiction private eye characters, and possesses a sharp intuition that allows him to regularly deduce the culprit behind a crime before having Philip provide evidence to confirm his suspicions. Vowing to ensure that no one ever feels sad, Shotaro became a protégé of Fuuto's private investigator Sokichi Narumi after admiring his work as a child. Due to Shotaro being incapable of making cold-hearted decisions most of the time due to his kindhearted nature and refusal to conform to the stereotypes of characters from the Detective Noir tales he emulates, he is fraudulently considered "half-boiled" by his boss Akiko despite this frequently being disproven and his way to approaching cases proven time and again to be the correct ones. He controls Kamen Rider Double's left side, which he can change into three different fighting styles by changing Gaia Memories; Joker for hand-to-hand combat, Metal for melee weapon combat, and Trigger for long-range projectile combat. Shotaro can also become Kamen Rider Joker, whenever Philip is unavailable to fuse with Shotaro as Kamen Rider Double.