Ultra: Legendary Train Conductor Severn

Xian Zhen accidentally traveled into the Ultra Universe and was rescued by his lover King Seven who was passing by. He accidentally absorbed Seven's light and became Ultraman Seven X. After that, Xian Zhen originally planned to have adventures in the universe, but was taken to a different dimension by a different-dimensional train and became the conductor of the different-dimensional train. He also came to the first world of his train journey: the world of monster girls.