I wouldn't be surprised to learn that Japan has had something like this for a while. It sounds like those ever-popular vitual dating game (which some people have apparently married over there) gone the way of Facebook. I also imagine they will insert microtransactions into the service too, though what those paid services would be are too disturbing to contemplate.
Normally I would chalk this up to an april fool's joke, but it's too early.
Truth be told, I don't think there will be any point to "virtual girlfriends" until we actually have real VR or Neural Interface technology.
I'd also imagine it could provide some new inspiration for a modernized take on Fred Sabergagan's "Octagon" (a novel). The story having to do with the infancy of social games (this was back in the 1980s) back when things like Play-By-Mail gaming (where you paid by the turn), MUDs, and BBS "Door" games were the limit of interactive gaming. It's interesting to see how the technology for the game in that novel (Starweb if I remember) compares to what we actually have today (being very antiquidated).
The basic concept having to do with a computer playing these games, where you make alliances with other players. Contriving a way of "winning" it manufactures itself a robot body and starts heading out to kill other players, however this is being done for the benefit of one of the other players, a girl using the handle "Lucifer" who it won't kill for that reason.
The idea of a jealous computer is an old one, but I could see the concept seeming more real all of a sudden with technology going here. Especially when you deal with the idea of vitual entities, which are programs and databases that acehieve self awareness as opposed to deliverably created "artificial inteligences". The whole "I am not an AI, I was born in the primordial sea of information" schtick from Cyberpunk and dark future novels, and somewhat popularized to more mainstream nerddom via things like "Ghost In The Shell".