I started watching Gate the other day. Premise is a magical gate opens in the middle of a Japanese city and a squadron of fantasy monsters and medieval troops sullied fourth and starts murdering everyone they see. At first they overwhelm the police with those those gay lanyard pistols, but then the proper military shows up and the invasion is wiped out. Japan's defense force then going through the gate and their tanks and machine guns annihilates the army on the other side. The rest of the show so far has been about a scouting team trying to gather intelligence, establish diplomatic ties, and demonstrate the superiority of modern military tech. There's also a subplot where Russia, China, and the US are competing to covertly to gain access to the gate.