I, Takumi Katsuragi, Am the Real Build

There is not only one universe, but many. Each has its own development path, but the same cause has the same result, so they are all similar. An unexpected event is enough to make another universe slightly different from another. For example: Among the many universes, there is one and only one universe, where Katsuragi happened to switch the Build drive that was switched by Evolt. Now, a new legend begins!