Fuuto Tantei is a mystery-action anime and manga series set in the city of Fuuto, where detective Shotaro Hidari and his partner Philip investigate bizarre cases linked to the remnants of the organization that once threatened their world. As a sequel/spin-off to Kamen Rider W, it blends detective work, supernatural threats, and tokusatsu-inspired action. The story follows their efforts to protect Fuuto while uncovering secrets behind Gaia Memories and dangerous new enemies.