AoH - owoovo

Um, sorry to ask, but I couldn't help but notice that a lot of your pics have the abbreviation "AoH" in front of them... it seems to be a series of some sort since there seem to be a set number of characters from it, but try as I might, I haven't been able to figure out what it exactly stands for so... what does it stand for exactly?

And by the way, you have a very cute style of drawing, I'll have to commission you sometime in the future.