「おとこの娘のトビラ」 is billed as an exclusive C77 item, but it will be distributed over iTunes in the near future. Just like with their previous mini-album, VIEWS CORPORATION will handle the Comiket distribution. Sadly no samples yet, but they should pop up any day now. There doesn't appear to be any game tied-up to this release, nor is it being promoted as a formal MOSAIC.WAV single... it just appears to be one of those spur of the moment things.
By the way, mi~ko (as サテラ) and her BFF 新堂真弓 (as ヒカリ, clearly the dominant one) have teamed up for a new web radio show titled アキバニュースサテライト (Akiba News Satellite). Fun times to be had by all, not much in terms of news as far as I can tell however. Although this is episode #1, they're not saying when or if the second episode will go up.