Han Yuwon has survived three years by pretending to be a beta in Seoryun City, a place where designation can decide a person's future.
He keeps his scent hidden, his papers clean, and his life as quiet as possible. Being noticed is dangerous. Being wanted is worse.
Then Kang Seojun finds him.
Seojun is the feared alpha heir of House Kang, a man known for his cold precision and ruthless control. When he discovers the truth beneath Yuwon's forged beta papers, he does not expose him. Instead, he offers a ninety-day protection contract.
To Yuwon, the contract looks like another cage.
To Seojun, it is the only way to keep him safe from the powerful families hunting his sealed records.
But the longer they stay bound by the contract, the harder it becomes to tell where protection ends and ownership begins. As desire, secrets, and old family crimes pull them closer, Yuwon discovers that his hidden registry number is not just proof of who he is.
It is the key to a ledger powerful enough to destroy the Council.
Now Yuwon must decide whether the ruthless alpha is his safest lie, his greatest risk, or the first man powerful enough to protect his freedom without owning it.