honestly I think it's a great idea. As someone who loves both shmups and games like zero escape I love this crossover. In shmups some crossovers make no sense whatsoever which is what makes it so great. If you've ever played a doujin shmup before you'd know people have make hatsune miku shmup, clannad shmup, fate stay shmup. Things like that and its great. So from a VN reader perspective I could see how this is weird but to me its awesome.