Gonna butt in here to say that, nope, it's not an anime. Voice synthesizer, actually, and many of the voices have drawn mascots. You should look it up. Neat stuff.
I absolutely love Niratama and am thrilled to see this one up (I'd read it before~). Hope her Miku/Rin doujins make it up here, mmm. (Though I sorta wish she didn't always use the same position...? Not that there's anything wrong with it, but, y'know, variety.)