You know the story well. In a dystopian world, the despotic siblings who rule with an iron fist murder a family who opposes them. The only survivor, a young boy, left deaf and mute by the experience, trains his entire life with a very stoned shaman for a mission of revenge with only the mental incarnation of his dead sister and his internal monologue, the voice of his favorite childhood video game, for company. Yeah, that old yarn, right? And thus, we have Boy Kills World.