Kiseijuu is a tale about a symbiotic relation between a teenager and the parasite entity that failed to take over his brain and ended up taking the place of his right hand. It is a dark story, where bad things can happen to anyone, but also a very compelling one. Shinichi is a normal guy until all the trouble starts and, as the series goes, he evolves into someone that almost seems to be made of steel. He gets to the point where he has to learn how to become more human again, making a full circle in his character development in a very interesting and unique way.This anime shows that the hardships and the losses in life can change us, but in the end we have to move on, getting stronger from it, but without letting those who stay by our side suffer for it.Kiseijuu is on the violent side, but it is not based in shocking with its gore. If you pass over the strong imagery of the series, you will find a complex and still consistent story, with good characters and a good pacing.