Takumi is a Grimm-a monster possessing the body of a deceased human. He used to be widely feared by mortals, but after regaining his soul and encountering a sentient belt known as Shiko, he became a Kamen Rider. Now, he fights his fellow Grimm in order to protect humanity and right his past wrongs. Atone your sins, Himura Takumi! Tatakai, Kamen Rider Shinigami!

Corinth is gone, and humanity is almost extinct - Dr. K is the sole survivor. Venjix has traded one Earth for another, seeking to replicate his decimation of Earth-2 on Earth-1. To save our world, Dr. K must recruit a new team of Rangers; soon, 3 college students with attitude shall become - Power Rangers: CPU! (Go-Busters Re-Adaptation Fic) (AU RPM Sequel)