Gate: Jieitai Kanochi nite, Kaku Tatakaeri is about a fantasy world and a modern world that made first contact and started a war. On this episode, a mysterious gate appeared and a fantasy army starts to invade an area in Japan.
The setting reminds me of another series called Outbreak Company where they also have similar things (like the male lead being an otaku) but this series is a bit more intense or serious. Also the action is fantastic to watch and I quite wonder what the Self Defense Force is going to do against the fantasy world. Other than that, I'll be really looking forward for this series since it's similar to Outbreak Company so far. Overall, awesome introduction and some cool war action.
Conclusion: Awesome introduction and some cool war action.