Time travel and doujin Long Fei is an otaku who traveled to another world. In the original world, he was an otaku who was a fan of Gundam and military science fiction. He died in an accident and was reincarnated in another world. The Gundam works he had seen before his death and The technology in various military novels can be brought to another world. How will he use the Gundam created by Long Fei? What waves can it cause in this different world?