Set on a giant, almost finished bridge between Sadogashima and Niigata. Abandoned by the government, the bridge, and the giant man-made floating island at the center, has become a city of criminals and societal drop-outs.

''Etsusa Bridge'' is part of an overarching [[TheVerse Verse]] of light novels written by Narita Ryohgo that includes ''LightNovel/{{Vamp}}'', ''LightNovel/{{Baccano}}'', ''LightNovel/{{Durarara}}'', and ''[[LightNovel/HariyamaSan Hariyama-san]]''.

!!Tropes in ''Etsusa Bridge'' include:
* AnimalMotifs: The first volume, ''Bow Wow! ~Two Dog Night~'', is centered around two characters that are likened to dogs. The title of the second volume is ''Mew Mew! ~Crazy Cat's Night''.
** AnimalThemeNaming: The aforementioned characters both have kanji relating to dogs in their names.
* BadAss
* FloatingContinent: Limited to just an island, but still counts.
* OddNameOut: Look at the list of Naritaverse works. ''Etsusa Bridge'' is the only one with A) more than one word, and B) no exclamation points, until the release of ''[[LightNovel/HariyamaSan Hariyama-san]]''.
* RuleOfCool
* SignatureLaugh: Kelly’s ever-present “Heehahahaha!”.
* TheVerse: Directly connected to ''{{LightNovel/Durarara}}'', and said to be set 15-20 years after it.
* WretchedHive: The floating island appears to be this.