She's a Passerby, But Can See the Protagonist's Halo - Chapter 10

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.

The second moon marked the beginning of a revolutionary change.

With the emergence of monsters and dungeons in modern society, and the ability users who fight against them, the world faces a shift in its paradigm.

It heralds the advent of a new energy source and the decline of traditional occupations.

Common sense thus becomes warped and imagination becomes reality.

[Your shadow is alive.][Feed your shadow, devour souls, level up, gain skills, complete quests, and grow stronger.][Do you wish to view your current stats?]In the magical world of Aetherus, Damon Grey is the weakest student at Aether Academy, relentlessly bullied and ridiculed for his lack of power and defiant personality. Yet, he endures the torment, clinging to his scholarship—the only thing providing him with the funds to keep his sick sister alive.After a brutal attack leaves him near death, Damon encounters a dark viscous entity in the forest that fuses with his shadow, awakening the Living Shadow System. This strange power grants him unimaginable abilities but comes with a grim cost—a relentless hunger for souls and flesh to feed his shadow.Now, with his shadow alive and insatiable, Damon faces a terrible choice: feed it to grow stronger or starve it and die with it.In a world ruled by ruthless nobles, deadly monsters, and power-hungry demons, Damon must decide if his newfound power is a curse or the only way to survive. With the Living Shadow System, his fate is clear: devour or be devoured.

In a world where human and monsters relied on mystical fruits and their inner power to fight for dominance, a lost soul was thrown, given the powers from all the other worlds he’s known. But there was a catch; he had no control over what power he would get! With knowledge beyond that of most, he sails his path to the top of the one piece world!

- Description from Novelupdates