Flowe-r Cerebrum

A sunken city, a target to retrieve, and a protagonist whose mission stops being simple the moment they get close to it. The setting is ash and ruins after a war that ended nothing, and the story treats that as background rot rather than scenery.

The premise is a retrieval job that turns into an interrogation of the past. Sent to track down a target for headquarters, the protagonist gets pulled into old wounds from the war and cracks in their own head that the job was never supposed to touch. Loyalty, power, and what's left of humanity get harder to tell apart the closer they get to the answer.

Play follows that search through the wreckage, mixing rpg-style progression with the visual novel's dialogue and choices, with both a male and female protagonist available depending on whose perspective you want on the same collapse. The developer notes are meant to be read before starting, which says something about how much the game expects you to bring to it.