He is drawn into a world of fighting giant robots in a game-like world. However, Kyo soon comes to realize that the world that he is living in might not even be real at all.

但是，有一天，他在突然到来的神秘转校生的引导下，卷入了异世界巨型机器人的战斗。

youdao

Rail guns play a major part in nearly every fanciful battle of the future, whether it be giant robots fighting for control of the Inner Sphere or the last remaining member of Noble Team holding off the Covenant invasion for as long as possible.

ENGADGET: Navy's prototype rail gun projectile hits mach 7 at 33 megajoules, our hearts skip a beat (video)