Takafumi's uncle went into a coma seventeen years ago, but he has since emerged from it like a man from the dead. Soon, Takafumi learns two strange facts: His uncle is obsessed with video games, and while unconscious, he was actually taken to another world as a brave protector! Takafumi now needs to catch his uncle up on two decades of history, including smartphones, high-speed internet, contemporary anime tropes, and the devastating results of the '90s console war, in addition to living with an uncle who is figuratively miraculous.