I donīt see how "bloody and violent action" makes this anime any more unique. We already saw stuff like "Kore wa Zombie desuka". And Iīd bet thereīs a ton of harem-anime that include violence. So, no, from the plot description and the design of the girl in the OP, yeah, this is about as generic as a new show can be.

Which is sad, because it sounded kinda interesting when I read about the mysterious, black, super-heavy cube. But then it proceeded to "naked girl", sigh. Doesnt help that the girl looks like the one from Denpa Onna to Seishun Gakuen.