Gintama meets the end of the Victorian Era.
The city of London had undergone a name change. It is now called Edo, after the foreigners from the East invaded the land. The European streets have integrated the imported goods of the Amanto, or as Gintoki liked to call them, "aliens" due to their strange style of dress and mannerism.
Gintoki was known by the native residents of Edo as the "Jack of All Trades" or as the Amanto liked to call him "万事屋 銀"(Yorozuya Gin). On a particularly harsh winter, he witnessed a little boy craft a make-shift house out of the leftover scraps in the junkyard as a shelter from the cold. He decided to take in the orphan boy in order to help him with the business. He raises Sougo alongside his daughter, Kagura, the only memento left of his late wife excluding that mangy mutt of hers, Sadaharu. There had never been a dull moment since.
As the years passed, the children grew taller, although Gintoki often wondered if they had grown any wiser as their fights had become increasingly violent and the damages to their surroundings had become more costly to repair.
Sougo Okita possessed skilled hands, perfect for Gintoki, the owner of "Yorozuya", a flourishing business nowadays. Kagura, on the other hand, didn't really have a skill with tools, cooking, cleaning or really anything. Her only merit was her strength. It often seemed that she could rival the force of a thousand men any day. Her monstrous strength is reminiscent of her mother, of course.
The format is a series of short stories (memories) mapping out Okita, Kagura and Gintoki's lives along with the strange people they meet. Just like an anime.
Disclaimer: Hideaki Sorachi owns Gintama.
*Check end of "Intro" for the new chapters.
*Don't need to watch/read Gintama to understand, but they will act canon.
*I do NOT own the cover, it was created beautifully by Cygnetzzz on: http://cygnetzzz.deviantart.com/art/Antique-shop-371256581