Accompanying the Phoenix - Chapter 71.2

A teenager named Evan Mason was reincarnated into the magical world of Harry Potter and goes to school at Hogwarts!
With only his knowledge of the future and great talent for magic, he takes the path towards the top of the magic world, only to realize that ever step he took, changed everything!

- Description from Novelupdates

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.

Set in the same world as Durarara, but 15-20 years later. There is almost no overlap between Etsusa Bridge and the other novels.

Empire of the Ring is a Korean modern fantasy epic adventure novel that sets in the nations of the Caucasus mountain range which separates Europe and Asia. The nations of Caucasus are regions of many conflicts over territories, ethnicities, and religions. The story begins as Lee Youngho, a warm-hearted Korean merchandiser, takes a business trip to a disputed territory of the Caucasus nations to sell Korean unmanned security systems only to get misconstrued as a spy and caught by Armenian militia. Youngho eventually gets involved with the militia and CIA to help out people of the regions from conflicts and works toward a birth of a new empire in Caucasus.

In the post-apocalyptic age, men were damned.