Kamen Rider Zero One Parallel World

What's his father's crime? He worked hard for twelve years for his son's dream of "making his father smile from the heart", and finally gave up the opportunity of Rei and Kamen Rider Zero-One to someone. In the ordinary TV plot, it was also for his son to transform into Rock Locust to prevent Yak from taking off. Then he came back and used his own body to protect his son from being affected by the explosion. The Zero-One Belt was made by him for his son to protect the harmonious coexistence of Shumajia and humans. And his grandfather was just an ordinary person who invented Shumajia.