Help with anime question??!

i asked this question before but it was a bit vague-not that its any better now!. ok I used to watch an anime cartoon about-well it had some people in it who couldn't go out in direct sunlight!. they weren't vampires just to make that clear!. i'd love to watch it again but i can't remember the name!. if you know it or something similar could you please let me know!? i know its very vague and im sorry!.
oh and it wasn't blood + ,by the way sorry!.Www@Enter-QA@Com

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