Sumire spends her whole life alone with ghosts until someone finally needs her for exactly what she sees. The real story isn't about winning fights, it's about two girls learning that the darkness they're fighting lives inside them too. Lucia's power and Sumire's empathy collide every episode, and the show doesn't pretend that makes them safe from becoming the very thing they're trying to destroy. The romance builds quietly alongside the horror, grounded in something true: two people who understand what it costs to keep looking at things others can't bear to see. Twelve episodes is thin, but the show uses every frame to make you believe these two matter to each other.

Sumire has been able to see ghosts since she was little, but when she tells friends and family, they dismiss her as a liar. Her life changes when she crosses paths with Lucia, a gothic lolita clad hunter who destroys Virus, demons that feed on human souls. After the pin of Lucia's brooch pricks her, Sumire can see demons, and they start coming after her, seemingly drawn to her power. She chooses to put her gift to use and joins Lucia in the Venus Vanguard, a group devoted to wiping out Virus. As they fight, the girls come to see that every life deserves saving, and they also find a potential for evil within themselves. The series is a supernatural drama with romance in its mix.