Visual novels are weird. On one hand they are mostly softcore porn (some hardcore) about loli/moe girls.
Otoh, they are one of the best places for an indie game maker/writer/artist to break into the game industry in Japan, so they tend to have the most creative and batshit crazy plots. This is because if you have a cool story idea in your head, instead of writing a novel, you can make a visual novel and sell it to the gamer/anime crowd.
That's why you get stuff like Higurashi, or Tsukihime, or Air, or all other kinds of interesting plots.
If I didn't hate reading paragraphs and paragraphs of Japanese, I'd try to play more. I really want to read Umineko at some point. The visuals looks so good in 1080p on the PS3 and the story seems interesting.
spoiler (click to show/hide)
1080p visual novels...nom nom