Kyou Kara Ma no Tsuku Jiyuugyou is the novel the anime and manga are based on. It's about a boy named Yuuri, who gets himself flushed down a toilet into another world. There, he finds out he's the Maoh (demon king) and that the Mazoku (demons) expect him to lead them against the human race. The novel is told from Yuuri's PoV, with plenty of side-commentary that is left out of the show.
Born and raised in Japan for 15 years, Yuri Shibuya, an ordinary baseball boy, is suddenly transported to another world one day. He ends up in a world where people with black eyes and black hair are feared as "devil lords"... Surrounded by his beautiful and unique subjects, His Majesty Yuri has been appointed as the 27th Demon King of the Great Demon Kingdom. What will tomorrow be like? Delivered full of original elements! [Web manga on Comic Bushiroad Web](https://comic-growl.com/episode/13933686331795933166)
This manga is a collection of short stories featuring the characters of Kyou Kara Maou!
From [Aerandria Scans](https://www.mangaupdates.com/groups.html?id=1242): Wolfram and Yuuri have been a couple for sometime but one morning Wolfram blurts out that he wants to have Yuuri’s baby. What is Yuuri to do? And where did that mysterious egg come from? Drawn in entirely adorable chibis!
Yuuri wakes up one morning to discover that lying in his bed is a baby that looks just like Wolfram. Where did this baby come from and who exactly is he anyways 😕
Pairing: Yuuri x Wolfram From [Onadoru Euphoria](https://www.mangaupdates.com/groups.html?id=670): A Wolfram-centric doujinshi about Wolfram and his father's wish for him to be king.

