Ultraman: A good pilot doesn't choose his own Ultraman.

In a world of Ultramen, Jiang Yu, an ordinary individual, arrives with a mysterious crystal that can harness the powers of both monsters and Ultramen. As he travels between various Ultraman worlds, Jiang Yu becomes an enthusiastic citizen, eventually gaining the ability to transform using a device. However, his unorthodox methods and disregard for conventional procedure cause a stir among the pilots, leading to a series of humorous and unexpected interactions. Jiang Yu's transformations are marked by his tendency to improvise and disregard the usual protocol, often resulting in unexpected outcomes. Despite the mayhem he causes, Jiang Yu remains confident in his abilities, and his unorthodox style gradually becomes the norm in the Ultramen world.