Norse mythology and lesbians. As a german gay girl, this is basically right up my alley.
Solid game overall, cute artwork, funny little story and challenging bossfights.
Only two things though: Mjölnir wasn't all that useful. I used it to beat Wakasagihime faster and then only used bullets because there was simply no good window to get in close and whack them.
Also, Reimu was very slow. Running with shift helped, but having to hold shift the entire time sucked.
Overall, pretty good effort though.