Just a simpleton otaku, not hardcore, not softcore.
Most likely on PSP, if they're going for console Wii would be the best. If they decide to make it for PS3/360, I'll be expecting wonderful graphics.
置き場がない！ (Okiba ga Nai!) from AkabeeSoft2. If you could access their site using JP IP address, go ahead and give it a try
Yet those doujin games sometime lacked what it needs to be called a good game, like story and artwork.