God-Tier Case Solver: I Can See the Tags on Everything

The protagonist, Ryan Kyle, was an ordinary overworked office worker on Earth. By accident, he transmigrated to a sword-and-magic world and became the lowest-ranking dockhand in the kingdom's capital. While moving the body of a noble who had supposedly "drowned by accident," he awakened the [All Things Information System], which let him see the hidden information about anyone or anything.

From the start, Ryan used the System to see through a perfect locked-room murder. He went from an ignored dockhand to a trainee investigator for the City Guard, leaving everyone stunned.

After that, he used his golden finger to "see through the truth" and crack one bizarre case after another: from an "alchemist's accidental explosion" to the theft of a holy relic from the Church, from a headless knight's midnight hunt to a vampire lord's string of murders. With every case he solved, his status rose and his strength grew, along with his power.

As his investigations grew stranger and reached ever higher levels, he gradually discovered that all these seemingly isolated cases pointed to an ancient cult bent on overthrowing the kingdom and bringing an evil god into the mortal world. In the end, Ryan grew from a nobody who only wanted to protect himself into the "God of Truth," standing at the pinnacle of the kingdom and playing a game of wits with an evil god. Together with the heroine, he saved the entire world.