Three S-Class Huntresses raised Cain Vernier like their own son. They bathed him, fed him, kissed his bruises goodnight. But Cain was never truly theirs. Not by blood. Not by fate. Not by the dark truth buried twelve years ago. At age 17, Cain learns what he really is: The last surviving member of a cursed demon bloodline. A walking apocalypse—dormant, for now. There’s only one thing keeping his monstrous instincts at bay: A sacred ritual called The Marking, where his 'mothers' inject part of themselves into him… Through a kiss. Of blood. And something more. Now, what once felt like maternal affection begins to twist. Loyalties blur. Desires awaken. And Cain must confront the most forbidden truth of all: "What happens when a boy no longer wants to be their son ... but something 'more'?"