Spoiler!


A gate to another dimension has burst open, and from it emerge gigantic invincible creatures that threaten all of humanity. Earth's only defense is a mysterious group of warriors who have co-opted the alien technology in order to fight back!
This description is just a small piece of the cake, as always. I recomend you to give it a try. Its pretty entertaining and has cool chars.

http://www.mangainn.com/manga/chapte...ger-chapter-01