Masked Rider ZO

Based on the live action movie. Masaru Aso has gone missing from the public, due to being used as a genetic experiment by Doctor Mochizuki in order to create a perfect lifeform. Aso goes to hide in the forests from civilization due to his disgust on his "form" before he was summoned to save Dr. Mochizuki's son, Hiroshi, from being targeted by monsters from Neo Organism.