Since you're dealing with a same sex couple, in order to avoid confusion, it's usually best to give them names straight off. Just a style thing: is it really necessary to space every sentence onto a new line? I find paragraphs more interesting.

I don't really know much about homunculus'...and by that I mean nothing at all. What are they? But that's my fault, not yours.

I've not read much femmeslash on FP, so I don't know much about what the dominant partner's character is usually like. But, it seems to me that Depression might as well be a man, 'cause she acts a lot like one O__O. But that might just be 'cause I know very little about how these relationships work.

I liked the ending though ^^, it was sweet. And you used an interesting choice of character names xD.

Oh, I love this. :P