I think I might drop Blade Dance for being too generic and saturated with T & A with no good plot, but I hang in there for 3 episodes. If you're going to keep watching, I'll bump the discussion. I found this harem show more tolerable and funner to watch. I thought he had more than 4 girls in his harem when I watched the OP>
Seems like he is close with "Nanana" ghost girl. I'm not good with names.