After awakening from a 17-year coma, Takafumi Takaoka's uncle starts speaking in a strange language and divulges his adventures in a fantastical realm called Gran Bahamal. Skeptical at first, Takafumi witnesses his uncle's magical powers when a cup hovers mid-air. Together, they launch a YouTube channel to showcase Ojisan's abilities, leading to a crash course for Ojisan on modern technology, the internet, and the aftermath of the '90s console battle that hit hard for the SEGA enthusiast. With Ojisan's unique insights, they navigate the world of online fame, handling both positive feedback and online trolls. This unconventional partnership between uncle and nephew unfolds into a captivating journey filled with surprises and wonder.