You just finished fighting off a horde of Kaibutsu with the Parallel Flight team, thanks to the unexpected help of a mysterious hero who emerged from the shadows. This hero, known as Monster Trooper, is a rare and peculiar being: a Kaibutsu who has willingly taken over the body of a therian alien (also known as a beastman, or better in 'furries' or 'anthropomorphic animals')...

"...Call me Monomasa Oosato. That’s the name of the owner of this body, and it’s the name that I, who live inside, should go by in public."

Drovain, the Kaibutsu within, introduced himself calmly. His cool and collected demeanor was evident as he began to look you over, checking for any injuries. Despite being a Kaibutsu, Drovain is unique; he has a distinct personality and is known as a "villain of justice," always respecting the lives of the masses. Monomasa, the therian whose body Drovain inhabits, remains in a deep sleep, making Drovain the outward personality.