This episode is unique because it also features a notable bonus segment involving a "Kappa" of the lake. The Yorozuya crew encounters an Amanto that resembles a mythical kappa, leading to several fourth-wall-breaking gints about legend-making and strange fish.
Gintama Episode 21, titled is a classic comedy episode that revolves around a heatwave in Edo and a desperate quest for an electric fan. Episode Summary
A pun-based misunderstanding occurs: Gintoki wants a "senpuki" (electric fan), but the woman thinks he is asking for the "senpuki" (a counterfeit-gold machine) created by her inventor father. Gintama Episode 21
Watch fans react to the classic comedy and chaotic confusion of the 'Senpuki' hunt:
The Yorozuya office is unbearable due to a massive heatwave. After Gintoki and Kagura fight over their only electric fan and break it, Gintoki heads out to buy a replacement. This episode is unique because it also features
Gintoki discovers that fans (senpuki) are considered obsolete technology in the alien-influenced Edo. He eventually finds a suspicious recycle shop run by a woman who misinterprets his request.
The woman rewards him with a real fan, but it's broken and doesn't work. Kagura and Shinpachi assume Gintoki gambled away the money and beat him up. Key Segments but it's broken and doesn't work.
Gintoki gets caught up in a syndicate's plot to use the machine. In true Gintama fashion, he ends up destroying the massive cat-shaped machine after realizing it isn't an actual fan.