"Bloody Cross" is a supernatural fantasy manga that intertwines themes of religion, destiny, and conflict between celestial beings. The narrative centers on Tsukimiya, a half-angel girl who carries the blood of both angels and demons. Her unique heritage makes her a target for various factions seeking to exploit her powers. The story begins with Tsukimiya living a relatively peaceful life until she is drawn into a prophecy involving the "Bloody Cross," a sacred relic said to grant immense power to those who possess it. This relic is tied to the fate of the world, and its activation could lead to catastrophic consequences.

Tsukimiya is accompanied by Hinata, a vampire who serves as her protector and guide. Together, they navigate a world filled with angels, demons, and humans, each with their own agendas. Angels, led by the enigmatic and ruthless Seraphim, seek to maintain order and purity, often at the expense of those they deem impure. Demons, on the other hand, are portrayed as chaotic and power-hungry, with some factions aiming to use Tsukimiya to tip the balance in their favor. Humans, caught in the middle, are often portrayed as pawns or victims in this celestial struggle.

As the story progresses, Tsukimiya discovers more about her origins and the true nature of the Bloody Cross. Her journey is fraught with battles, betrayals, and moral dilemmas, as she grapples with her dual heritage and the weight of her destiny. Key characters include the Seraphim, who represent the rigid and often oppressive order of heaven, and various demon lords who challenge Tsukimiya’s resolve. The narrative explores themes of identity, free will, and the consequences of power, as Tsukimiya must decide whether to embrace her role in the prophecy or forge her own path.

The manga blends action, mystery, and emotional depth, with a focus on the relationships between its characters. Tsukimiya’s bond with Hinata is central to the story, providing both moments of levity and emotional stakes. The world-building is intricate, with a detailed mythology that draws from religious and supernatural lore. The plot is driven by a series of escalating conflicts, culminating in a climactic confrontation that forces Tsukimiya to confront her true self and the implications of her choices.