After emerging from a seventeen-year coma, Takafumi's uncle shocks him by revealing his love for video games and his previous life as a heroic guardian in another realm. As Takafumi adjusts to living with this magically transformed uncle, he embarks on a crash course to update him on two decades of technological advancements, including smartphones, high-speed internet, contemporary anime trends, and the fallout from the intense '90s console rivalry.