#039 of 2D Dream Bunko/Pocketnovels. It's pretty clear this label is focusing on "harem" theme since their 20 or 30-ish entry somewhere around 2006, unlike their early titles, much less harsh contents are involved since then, in order to distinguish itself to "2D Dream Novels".
there is no info on mugi atm, but you can get the work from: http://www.amazon.co.jp/gp/product/4860322525/