I had asked several friends, both among the Art Cube fans and Japanese people in general, but no one could say what the correct way of reading it was. So I asked the band's staff at tonight's live, and this was the answer I got: "Rasentsuk.... eh? Getsu? eeeeeh? D: D: I can't read this!!? @_@;;;"
The next Tokyo live isn't until the end of November, so they might update their website before then, letting us know what the title is. The poor staff girl looked slightly panicky when she realized she couldn't answer my question, so she'll probably find out as soon as possible.