Meiji Tokyo Renka: Hana Kagami no Fantasia

Trained to be a killer since he was a child, a lost man sets out to avenge his father. After years of chasing his father's murderer, he realizes that the real person who killed his father is the person that raised him.. In a dystopian future, the world is suffering from overpopulation. A group of radicals calling themselves the "Enthusiasts" are trying to prove the Myth to the world. The Myth is the world they are living in is inside of a shell, and there is a bigger and unknown world outside of it. Will, a depressed and cynical assassin, is determined to kill the leader of the Enthusiasts. But when he fails to kill a young Enthusiast, he begins to question whether or not the Myth may actually be true.