A Horror Novel’s Supporting Character Wants to Live as a Human

As he regained his senses, he realized that he had transmigrated into a web novel, and the problem was that it was a dreadful horror novel! The world was overflowing with unidentified gods and monsters, and the weakest beings in this universe were humans. The protagonist, who had possessed the body of ‘Arenheit Hartman,’ a member of a ruined family in this doomed world, discovered that their family was entwined with mysterious sorcery. “As a human, I will survive and live like a human.” Can Arenheit, with his rationality intact, reach the ending? — Description from novelcodex.org