It's called, Plaisir du lait, which basically means Pleasure of Milk by Google Translate
(Please correct if I'm wrong.)
It's a 7000-word story full of hardcore lemon
Not for readers under 18
You have been warned
Anyway, someone took it down and now I moved it to Novel-joy-.-com ;v;
Feel free to look it up there, since it's like one of the ONLY Vocaloid fanfics there.