Dungeon de Service Zangyou wo Shite Ita dake nanoni ~Sasurai no S-kyuu Tansakusha to Uwasa ni Natte Shimaimashita~

Dungeon de Service Zangyou wo Shite Ita dake nanoni ~Sasurai no S-kyuu Tansakusha to Uwasa ni Natte Shimaimashita~ originated as a Japanese light novel series written by KK. It follows the common trope of the dungeon-crawling fantasy genre, focusing on a protagonist who finds himself unexpectedly labeled as an S-rank adventurer simply because he was diligently performing overtime work within a dungeon environment. The series gained traction through the web novel platform Shosetsuka ni Naro, which serves as a common incubator for this style of light-hearted fantasy literature.

The narrative reflects the modern trend of 'salaryman fantasy,' where the mundane frustrations of office work are transposed into the high-stakes setting of RPG-style dungeons. KK utilizes this premise to explore character growth through the protagonist's reluctance to become a legendary figure, maintaining a humorous tone that contrasts corporate drudgery with heroic exploration. The work has since been adapted into manga format, expanding its reach within the light novel community and solidifying its place among contemporary fantasy light novel collections.