Higurashi no Naku Koro ni (Season 1, 26 episodes)

And don't make it just children style anime just by watching cover.. it give you totally different feeling about this anime.
I think this is was my first "Gore" anime i ever watched.
Keiichi is one of protagonists that moved to town called "Hinamizawa" after he was involved to event in his hometown.

He accidently shot girl to eye with toy gun when he was coming home from school. He got nickname "Magician of Words" which helped him to make new friends and become more popular in town of Hinamizawa.
He is affected by paranoia and driven to commit murder in start of anime.
There is also another protagonist who is female called Rena (Serious face on her

)

Most of time Rena is very kind and helpful, but sometimes she is controlled by Hinamizawa syndrome and is very dangerous on those times.
Rena's real name is "Reina", she used that name before she moved from Hinamizawa to Ibaraki with her parents one year prior to the events of the story. There she discovered her mother having an affair, causing Reina to smash all the windows in her new school and assault three male students with a metal bat under the influence of the
Hinamizawa syndrome.
Reina returned to Hinamizawa after that incident and changed name to Rena.
There is also 2nd season with 24 episodes and it is called Higurashi no Naku Koro ni Kai.
2 OVAs (Original Video Animation) with 5 episodes and 4 episodes length.
Opening for anime