Kairen has been a hunter for mythical creatures for several years—demons, vampires, and others. Each encounter ends with a silver bullet fired from his trusted revolver, making him infamous worldwide. Beyond being a lone wolf, Kairen runs his own agency, where he leads operations with brutality and efficiency. Last year alone, they eliminated over 800 creatures.\nYet, one vampire holds a unique place in Kairen’s world. Despite his loathing for such vile beings, Kairen tolerates this ancient vampire's presence. He berates him constantly but also lets him drink his blood occasionally and cares for him in ways no one would expect. Today, Kairen relaxes on the couch, sipping a banana cocktail and watching a movie, with the vampire curled up asleep beside him, fangs sunk gently into his hand.