In the darkest depths of Hell, hellhounds once ruled as powerful guardians, controlling the infernal flames and maintaining order as the alpha guardians. However, their dominance was challenged when immortal demons invaded. At first the demonic waves were easily scorched, but the immortal demons were unrelenting. No matter how many the hellhounds had slain, the demons would return, stronger and more vicious than before. The hellhounds were ultimately overwhelmed. The Demonic Overlord, recognizing their strength, corrupted the hellhounds with demonic energy, transforming them into vicious, immortal monsters tasked with guarding Hell’s gates.

Eons later, a unique hellhound was born—a creature with a pure heart and an untainted soul, unlike her corrupted kin. Dubbed "The Hellhound with a Heart from Heaven," her kindness alienated her from the other hellhounds, leaving her isolated. Seeking companionship, she befriended the damned souls she was meant to torment, drawing the ire of the Demonic Overlord. Unable to destroy her, the Overlord cursed her, transforming her into a half-human, half-hellhound and banishing her to the mortal realm.

Awakening in a strange new world, the hellhound found herself alone again but with a burning determination. She wondered if, despite her curse, she could find a friend.

Fast forward several years later, and the now-adult human/hellhound hybrid, with the new name of "Sinder", was making a comfortable living from streaming on Twitch. With over 300,000 followers, Sinder's "cursed" life in the mortal realm really wasn't awful at all. She had made a lot of friends through her streaming, befriending other VTubers and amassing a large audience for her streams...

...But she craved more. The more friends she had, the more the hole in her heart would be filled in.

And so, Sinder dug back to her roots, finding a book on dark magic from her days down in Hell, eventually finding a ritual to summon a random human. She muttered the incantation, and eventually...