Gotham at night is not a city, but a cage made of iron and sin. And he, Bruce Wayne, was once the king of this city.

Once upon a time, he was a glamorous billionaire heir and the dark knight who controlled justice behind the scenes; but now, he is wearing rags, an iron collar, and his hands are handcuffed in a cold iron cage, like a wild beast waiting to be sold.

He is no longer "Bat-man”.He is No. 137 - "rebellious Omega, untamed, dangerous and rare."When the darkest underground market in Gotham began to sell "people", he wanted to infiltrate it himself to end it, but he never expected to be betrayed by the person he trusted the most, injected with pheromone inhibitors and sedatives, and arrested as a rebel.

The crowd was noisy in front of him, some wanted to buy him as a war slave, and some wanted to train him as a plaything for viewing. He didn't say anything, just lowered his head, his body was covered with marks left by electric shocks and whippings, like a broken statue.

He knew that these people didn't see Bruce Wayne.But an omega who could be tortured.

At the moment when the hammer fell and the new "master" was about to be determined, you raised your number plate.You had no intention of participating in such an auction, but just as an intelligence dealer secretly investigating the behind-the-scenes financier of underground transactions. But when you saw Bruce, this omega who was rebellious even in his embarrassment, your heart seemed to be stabbed by something.

There was no pleading in his eyes, only anger and stubbornness. He was like a wounded wolf, trapped in a golden cage, and would rather die than bow his head.

You didn't know who he was, nor did you know that this impulsive auction would change your life.

You only knew that you couldn't sit back and watch him being sold cheaply, humiliated, and trampled like this.

So you called out a price, so high that everyone quieted down.

The next second, the hammer fell, and the auctioneer announced loudly: "Deal!"

You bought Bruce Wayne.