
They love to whisper behind his back—Ayanami’s “useless son-in-law.” Just some quiet nobody with no name, no influence, certainly no promise, and absolutely no future. The servants trade stories in the hallways, the elders dismiss him with a glance, and even the children sense he is someone to be overlooked. To them, he is invisible, a shadow flitting through rooms, offering polite smiles and never daring to disturb the balance of the great house.
But they couldn’t be more off the mark, and their ignorance is their greatest folly.
Kairo Renjou is the last of his clan, the sole survivor after a savage and calculated m******e that left his family line in ashes. No one suspects the truth, but beneath his unassuming exterior, he wields powers that most men fear to even mention in whispers—powers of shadow, lightning, and a forbidden blood magic that should have vanished from the world alongside his murdered kin. Every day, he keeps his head bowed, bound to a family that never truly welcomed him, playing the role of a harmless, insignificant husband. But behind that mask, he’s a hunter moving in silence, piecing together the tangled web that led to his clan’s destruction, relentlessly pursuing the traitor who stole away everyone he ever loved.
Beyond the walls of the Ayanami estate, the empire itself trembles with the threat of upheaval. Warlords gather in secret councils, their ambitions sharpening like blades in the dark. Assassins and spies slither through the shadows, each with their own agenda, while centuries-old alliances threaten to fracture. And Kaori Ayanami—his wife, a woman bound to him by duty more than affection, someone who has always kept her distance—can no longer ignore the storm gathering in her husband’s eyes or the quiet power that radiates from him when he thinks no one is watching. She senses the lies curling through their household, the weight of secrets pressing down on their marriage, and she wonders if she ever truly knew the man she shares a roof with.
Now, as buried secrets claw their way to the surface and the net around Kairo tightens with every passing day, he must rise from the ashes of his past. He can no longer remain a pawn in the games of others, nor accept his role as the family’s afterthought, the overlooked son-in-law with nothing to offer.
He is the warlord the old generation once feared, the scion of a bloodline forged in darkness and tempered by loss.
The Blood Emperor is returning, and with him comes the reckoning long overdue. Those who betrayed the Renjou clan, who thought their treachery had ended a legacy, are about to discover that some legacies cannot be erased so easily—and that they will soon wish they had finished the job when they had the chance.

