Or Jigoku Shoujo for weebz. The anime's about a website that can only be accessed at midnight and by only those who labor strong hatred. They type in a person's name and the hell girl comes in a hallucination to give them a straw doll with a string. If they untie the string, the person will be immediately sent to hell and they'll go after them once they die. The cases are fucked up most the time or are difficult to understand the reason behind the random persons' actions. There's also a plot in the last episodes of the seasons. (There are 3, each with 26 episodes.) In season 3 the hell girl possess a 16 year old girl by kissing her, then every time the string is untied you have to watch a horrible sequence where the 16yo girl's back opens up and a cocoon emerges from which the hell girl hatches. All the while you have to somehow endure the 16yo's scream. Who's heard of it?