Thinking of a Hentai Manga, can you name it?

[cluelessp]

Hi,

I've been thinking of a hentai manga I read awhile back but I can't seem to remember it's name. I've been searching like crazy but to no avail, I'm sure everyone understands how irritating that feels...

It's a pretty short series if I remember correctly in a modern setting. About a really smart lady who was very dark-skinned and well endowed...she's down on her luck and out of money so she moves in with this otaku of some sort. Then she frequently disappears and work on start-up ventures or something like that...Her name starts with an M if I remember correctly...

I apologize how brief and vague the description is, may even be somewhat inaccurate but it was a pretty long time ago. Will appreciate any help!