A fourth grader livestreaming his way through a block world where his giant robot is the only thing keeping reality from collapsing. The show treats this premise like it makes perfect sense, which is exactly why it works. Wataru and Ryuujinmaru aren't saving the world because of destiny or prophecy, they're doing it because the stream is live and Enjoda is real. That collision between a kid's instinct to perform and the actual weight of what he's fighting for is where this thing lives.
Ten-year-old Wataru Hoshibe dreams of becoming a superstar on RyuTube, the video platform where content creators battle it out for fame and followers. When a mysterious opportunity pulls him into an alternate dimension made entirely of floating blocks, Wataru discovers his real shot at stardom: partnering with Ryuujinmaru, a powerful mechanical beast he can pilot and customize. Together, they challenge increasingly difficult opponents across this strange, geometric world while viewers from both dimensions watch their every move. The catch is real: if Wataru loses, his channel disappears forever. As he climbs the ranks toward the final boss Enjoda, he learns that victory requires more than just mechanical firepower and viral moments. His journey becomes about understanding what it truly means to be a hero when the whole world is watching, and whether the person behind the screen matters more than the persona in front of the camera. Wataru's adventure blends over-the-top mecha action with genuine questions about ambition, friendship, and authenticity in the digital age.