I read this manga a while back, it was pretty short, either a oneshot, or about 5 chapters or something. It was about this girl who had a scholarship to a rich school, but then she came second and ended up as a maid to these three guys, and she falls in love with one of them. I think the last line of the entire manga was something like '(insert girl's name)'s rich husband will be me!'.

If anyone knows what it's called, please tell me!

Bishounen no Oheya maybe?

I am a breath of insanity in a world of chaos.

Me: Performing Random Acts of Klutziness for over 30 years.

i must be insane is right. beat me to it.