Instruct: Classify Amazon reviews into positive or negative sentiment
Query: It may mess with your head.

Takumi is a schizophrenic and a hikkikomori. He goes to school and anime shops but he slips in and out reality. He witnesses a murder and gets involved with a bunch of chicks that can materialize swords and have other strange powers. He has a unfortunate past that he has somehow forgotten. He is also the key to saving the city from the murderer.Chaos;Head is a very strange anime. I was kind of confused for an episode or 2. It's hard to figure out what's real and what's not. If you try not to figure it out and over think it you'll probably enjoy it more. The animation and the voice acting are good, and the story is pretty involved. The saving grace of this anime is the cast of characters. The characters are pretty cool and interesting. I actually enjoyed it more the 2nd time around. The story is very heavy and not for everyone. I think every anime fan should watch it, but I would try to rent it or watch it on youtube first.