The video starts with various schoolgirls asking Sega Shiro about his possessions:
Schoolgirl: “Sega Shiro, is that a Switch?”
Sega Shiro: “It’s a Sega!” (Game Gear, released in 1990.)
Schoolgirl: “Sega Shiro, are those sunglasses?”
Sega Shiro: “It’s a Sega!” (3D Glasses, released in 1987.)
Schoolgirl: “Is that a backpack?”
Sega Shiro: “It’s a Sega!” (Sega Saturn, released in 1994.)
When asked why he is always wearing his coat, he says “Father…” and a flashback of his past is shown—Segata Sanshiro training Sega Shiro to master the way of Sega, before setting off and leaving his wife and son behind. A nuclear missile kills him, and his coat falls into Sega Shiro’s hands.
After that, a masked man named Sega Hatan Shiro appears. His name seems to be a play on “Sega Saturn,” which is spelled “Sega Sataan” in Japanese. “Hatan” means “bankruptcy.” The video ends with Sega Shiro swearing to his father that he will protect Sega.