This is actually surprisingly well written sci fi lol. Obviously not the magical girls and fantastical parts, but how humanity reacts to aliens, the technology used, the tactics, things like mass drivers being used to fling resources back to earth... I'm just like 45 minutes into Gaiden and the non-H stuff is pretty compelling. It's a bit too guro for my tastes though... at least the tentacle stuff. I'd like to see the more human scenes.