Puchitto★Rock Shooter was a spin-off title of Black★Rock Shooter media franchise featuring chibi characters.
The player character (whose default appearance was that of a chibi Black★Rock Shooter) was one of the many wandering bounty hunters setting foot on Puchitto Planet to find the "Great Puchitto Planet Alien", who was rumored to hold the key to rule the universe, as well as the power to make all things come true for those who were bound to her.