Devils, Angels, Fallen Angels, Gods, Dragons and other supernatural beings all exist. But now a new race had begun to rise. Creatures and monsters whose goals is to bring forth despair to the world and its people, they are called "Phantoms". They are dangerous and will shake the supernatural world to its knees, but their is one person who can put a stop to them. Follow the adventures of Y/n Soma, the one who did not submit to despair and became something more. He is the ringed wizard who will change despair into hope. Sa, Showtime da!

This is the story of Y/n L/n, a teen who lives alone due to not having parents, but that won't stop him from being a hero after discovering a lab under a cafe named "Nascita". Follow him on his journey as the new "Kamen Rider Build" and his path to become one of the world's greatest heroes and the Symbol of Love and Peace.