I need a manga with twins in it. :3 I'd like for them to have a close relationship, but not twincest-y, like a lot are. Thanks. 😀

Twin's Labyrinth is one I like. They are more rivals than close, I think.

Sora o Daite Oyasumi

"For in all the world there are no people so piteous and forlorn as those who are forced to eat the bitter bread of dependency in their old age, and find how steep are the stairs of another man's house. Wherever they go they know themselves unwelcome. Wherever they are, they feel themselves a burden. There is no humiliation of the spirit they are not forced to endure. Their hearts are scarred all over with the stabs from cruel and callous speeches."

Kigeki wa Koi de Shinkasuru It's a shame it has an avarage 7,2 rating because I fid that manga really enjoyable. The art may not be everyone's cuppa, though. 🙂 )

This one comes to mind:
http://www.mangaupdates.com/series.html?id=10286