the main character has a good story and deep, they show you how the life would me if we are like cyborgs and no cyborgs in a post war. the opening is one of the best anime opening i've ever heard. you can't stop watch this anime because at the end of every episode there is to much suspense. if you want to watch a mature anime check it. the art is pretty good, with very details. it's a good anime, the second seasson is even better, you would love this anime if you like a good trama and fights. who ever say this anime is not goodis because they just watch animes ecchis or dramas.