Kamigoroshihime Zilch

Haruomi Io, a disinterested high school student, struggles with the emotional aftermath of losing his mother, younger sister, and a childhood friend. His detachment from life draws the attention of a hostile group known as the "Seventh Gospel Organization," who become a source of conflict for him. He is later joined by Zilch, a demoness who becomes an unexpected companion. As he navigates this new reality, Haruomi encounters supernatural elements and other female characters, which begin to shift his outlook.