Maou ni Natta Node, Dungeon Tsukutte Jingai-Musume to Honobono Suru #1

Maou ni Natta Node, Dungeon Tsukutte Jingai-Musume to Honobono Suru, also known by the English title I Became a Demon Lord so I Created a Dungeon and Spend Heartwarming Time with Non-Human Girls, originated as a light novel series written by Ryuo Minaba. The first volume was published in Japan in 2016, following the popularity of the web novel version originally serialized on the user-generated content site Shōsetsuka ni Narō. This genre of 'slow life' fantasy became a defining trend in Japanese light novel publishing during the mid-2010s, shifting the focus from intense conflict toward domestic comfort and world-building.

The character designs and illustrations for the initial volumes were provided by illustrator Teruichi Mogura. The design philosophy behind the series emphasizes a contrast between the potentially intimidating premise of becoming a Demon Lord and the gentle, lighthearted interactions between the protagonist and his companions. Upon its release, the volume served as a foundational entry for the franchise, which subsequently spawned a manga adaptation, further cementing its position within the niche of slice-of-life fantasy media.