Seventeen years ago, Takafumi's uncle fell into a coma, but now he has returned like a man risen from the grave. Soon, Takafumi uncovers two bizarre facts: his uncle values video games above all else, and while in a coma, he was actually transported to another world as some kind of heroic guardian! Now, Takafumi not only has to live with an uncle who is literally magical, but he also has to bring the man up to speed on two decades of history—smartphones, high-speed internet, modern anime tropes... and the traumatic outcome of the '90s console war!