I just remembered this one manga, but I forgot the name:

A girl lives with a demon (Who is a duke). The girl reminds the demon of flowers, and the demon is afraid to get close to the girl because he doesn't want her to turn into a dust (Or something like that). There is a maid/servant......and the girl dressed up as a dog for halloween...........

Please help!

Your mom goes to college.

1. Superior
2. Gintama
3. The bride of the water god
4. Chevalier D'eon

I think it might be

Hana to Akuma
[url]http://www.mangaupdates.com/series.html?id=14785[/url]

That's it, thanks!!!

Your mom goes to college.

1. Superior
2. Gintama
3. The bride of the water god
4. Chevalier D'eon