Lost Lune ~ the foreign god's eternal night

A decade has passed since the foreign god’s appearance, filling it with madness and destroying over a quarter of humanity within the first few months. Humanity has fought back but is still on its last legs against anomalous humanoid creatures with logic-defying powers. One of these fighters, Herber, loses their partner in a recent attack and has to fight to get them back against all odds.

[From itch.io]