Hell Girl. It's about a website called Hell Correspondence that can only be accessed at midnight and only if you have enough hatred in your heart, then you can type in the name of the person you hate and Hell Girl comes to take them immediately to Hell, but at the price of your own soul once you die.
It's really interesting, but it also shows how very different Japanese culture apparently is from Western culture. People get sent to Hell for little things that I would never even think of taking offence at, and whenever the current main character is a schoolgirl, chances are she's being bullied and the situation I described yesterday will come up sooner or later. That's weird, though, because I've also seen all five seasons of Sailor Moon, an anime that is ten years older and also from Japan, yet the girls go out with different boys all the time and no one ever says anything.