This game has been described as pretty much Recettear except far, far more fleshed out store-management, despite being released in 2003.
EDIT: Due to me finding plenty of info on this game, and because of the shame of this game being far more X-rated than I thought (thanks, Japan), I'm just gonna edit the rest of my post out.
I finally found that this thing is being sold on eBay for 450$. FOUR HUNDRED AND FIFTY DOLLARS. A link, for those who have a large amount of money sitting around and like Japanese eroge games:
http://www.ebay.com/itm/Japanese-Game-Soft-Brown-Doori-Dohri-Sanbanme-Softhouse-Chara-/281340181392