I've tagged this as original but she's technically an entry into a contest for Rêveur as explained in http://dic.pixiv.net/a/%E3%83%AC%E3%83%B4%E3%81%A1%E3%82%83%E3%82%93%E3%82%A4%E3%83%A9%E3%82%B3%E3%83%B3
If we happen to have a tag for that, I don't know it and have no idea what I'd search for, but I thought I'd toss that out there.

Holy crap I thought she dropped off the face of the Earth.