Toaru Majutsu no Index: New Testament - Volume 14, Epilogue: The Time for the Cradle Comes to an End - More_Purely,More_Bloody.

A detective travels across the United States and becomes an agent of the Los Angeles Police Department.

After getting through the initial confusion, he repeatedly solved strange cases, became famous all over the world, and was called the most legendary detective in history…

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Dreams are… a reality that only those who are capable can speak about.This was an era marked by the births of geniuses!This was an era where heroes could be found everywhere!The fierce conflict between the aristocrats and the civilians, the open and veiled battles between the Federation and the Empire, the restlessly lurking extraterrestrials…When the principles of truth were within the range of battleship cannons, when order had no place in this world… Mu Fan, with the mysterious intelligent life “Black” and his unwavering will, fiercely tore open the magnificent Great Galaxy Era!

In the Game Invasion Era, monsters run wild across the globe. George transmigrates into this world and starts as the weakest R-class Pet Tamer in the world.But then, something unexpected happens. He discovers he has an SSS-tier talent, and the stronger his binding targets become, the stronger he gets!Bind the Goblin King, and the Goblin Boss evolves into The Abyssal Demon God!-George gains a 1,000,000x combat power boost!- Bind the Elven Priestess, and the Elven Priestess Boss grows into The Elven God-King!- George gains a 10,000,000x life enhancement!- Bind the Flame-Winged Demon, and the Infernal Lord Boss breaks through to become The Profane God!- George gains a 1,000,000,000x talent boost!Soon, George himself is stunned.“Pet Tamer? Hmm… sorry, my 'pets' are all God-level Bosses.”The world is in shock:“Are you out of your mind? You call this R-class?”Holy Goddess Queen: “Sir, please spare me. I’m willing to do anything!”The Supreme Creator God: “He’s here! He’s bringing his pets with him!”

Long Fei, a cross-timer and doujin, is an otaku who traveled to another world. In the original world, he was an otaku fan of Gundam and military science fiction.

He died in an accident and was reincarnated into another world. The Gundam works he had read before his death and the techniques in various military novels could be brought to another world.

How would he use the Gundam that Long Fei created? What waves can be caused in this different world?

- Description from novelbuddy