Reincarnated as a Heretic Cultist Mob in an Eroge Where Everyone is Unhinged

After unexpectedly regaining the memories of his past life, Okuri Mercury realizes to his utter horror that he has been reincarnated into the world of "The Twilight Seeker", a notoriously brutal fantasy eroge where every single character possesses an extreme, psychopathic determination ("gangimari"). Worse yet, he is not the story's heroic protagonist or a blessed noble, but a disposable, low-ranking cultist in the sinister Temple of Arlos, having been kidnapped and thoroughly brainwashed as a child. While attempting to stay under the radar during a lethal clash against the righteous church's ruthless heroines, Okuri uses his meta-game knowledge to diffuse a catastrophic battle. However, his actions are horribly misunderstood by Yoannu, a terrifyingly sadistic high-ranking executive who mistakes his intervention for desperate romantic devotion. Now targeted by unhinged heroines on the outside and obsessive psychopaths on the inside, Okuri must navigate fatal misunderstandings, chaotic battles, and the cult's Grand Founder himself just to survive another day.