— Less spoiler short review —

Summary:
Shinichi Izumi a high school boy who was encountered by an unknown being called parasite. As the time flows many more of this parasitic beings started to show up and started to kill people. Shinichi teaming up with his parasite started new journey to save the human being from its demise. Parasites were a new unknown being. They take over a human body's control by mutating themselves with the human brain. They kill people for their food. They are physically more powerful than any other living beings. They don't have any kind of emotion like me humans to in fact they think rationally about everything. The parasite living inside Shinichi was named Migi. Migi wanted to coexist with Shinichi. Migi didn't need any human flash to survive. All over the world chaos started because this parasites. People were being killed and this matter needed to be solved as soon as possible. Many incidents took place and the government planned to exterminate Parasites.
Some of these parasites joined a alliance under a City mayor for a consistent food supply. Among them there was a prudent parasite owning a woman's body named 'Ryouko Tamiya' . It wanted to learn more about human kind and it's behavior , many facts which was unknown to it. But parasites started to make their move. After discovering a parasite body and analyzing it the government found a way to kill them. The Government planned a attack on the town hall which was a gathering site of many parasites. The attack was a success and they were able to wipe out a great number of parasites. This incident also created a fear among the parasite. Number of murders decreased drastically. Parasites made themselves accoustomed to human food. All these information about parasite remained confidencial. At a point people forgets about it starts their life again like before.

Protagonist:
Shinichi Izumi played nice role as the protagonist. The character development was really great. How getting influenced by a parasitic being changes your way of thinking. Although in some of the cases he was driven by emotion for which he made some mistakes. But as the time flows he realises what really matters is self preservance. He learned how to control himself in anytime while facing a pile of corpses or in any other dangerous situation. He forgets sadness and all other human emotions. But as a human being it's impossible to do so. 'Satomi Murano' was the person who made remind about these emotions which gone missing in him.

Overall :
Parasite is a great show to watch. The story was pretty great. What makes this really great is the fine character development. Just how a character becomes so much strong in the end. I also love the fact that it not only shows the thought of mankind towards a parasitic being but also the perception of a parasitic being about mankind.

Intro and Outro:
The intro song was the best . The vocal, lyrics and bgm was nicely done. As for the ending song it's quite decent.