Mythical Beast Groomer in Luento summary: The story is set in the world of Luento, where beastmen live and phantom beasts dwell, and describes the journey of Balm, a beastman, and Polo, a stray child phantom beast. Parm is a trimmer of phantom beasts and travels around trimming their overgrown nails and hair. The story begins when Parm meets a child of a new species of phantom beast that can speak.