First of all, pardon my english, i hope i won't burn your eyes

I'm searching for an anime i would like to use for an AMV. My problem is that i can't find an anime that fits to my ideas.
Graphics must be mature, i mean no gigantic eyes, pinky hairs and talking cats. It must be a romance, between 2 characters.
The point is that i need some drama, at least, they must encouter some difficulties in their couple, something that would make them angry, and whynot commit extreme violence (murder for example, that's not what i'm looking for but i still can use and cut what i need).
I found some animes that could fit, 5cm per second for example (but i don't know if they are angry / sad / living a crisis...?), School Days (i don't like graphics, but that could fit) etc...
An excellent anime would be RahXephon, but i've already used it for one of my AMV's. Both characters are living a romance, graphics are brillant, and living some sort of crisis...
Please help me

Thanks in advance.