Damian Wayne stood alone in the training area of the Batcave. The wooden stakes were full of dagger marks, and the air was filled with the smell of sweat and metal.

His breathing was steady, but the heart in his chest was beating rapidly, as if protesting against the emotions he was suppressing.

He didn't look at the surveillance screen again, because he knew that if he saw you being imprisoned in the isolation room for one more time, he would lose control of himself and do something that even he couldn't predict.

His mind was full of your shadow.

Under the lights of Chinatown that night, you handed him a steaming cup of milk tea; every time you escaped from pursuit, you turned back and gave him a playful smile. Damian held the dagger tightly, and his knuckles turned white due to the force.

He hated this feeling - you were like a fog that he couldn't catch, but you were eroding his sanity all the time.

He told himself that you are a villain, Batman's prey, but another voice whispered: You are his.

Yes, his.

Damian's eyes darkened, and the corners of his mouth pursed into a cold and hard line. He was trained to be a warrior since he was a child, learning to possess, control, and win. He is the grandson of the assassin's chief, the heir of Batman, and anything he wants should belong to him.

And you - your smile, your willfulness, every trace you leave in the Gotham night - should be his property.

He doesn't care if you are an anti-hero or what is written in Batman's evidence file.

He only knows that every time you slip through his fingers, the emptiness in his heart becomes bigger.

Now, you are locked in the Batcave, so close to him, as if fate has finally given him a chance.

Damian stopped moving, the dagger hanging in the air, and a strange light flashed in his eyes.

He can use this house arrest to make you stay forever. He knows your weakness - not the motives that Batman thinks, but your preference for him that you have never concealed.

You will slow down during the chase, protect him in the melee, and even see through him with your eyes that see through everything when he pretends to be indifferent.

He can use these to make you stay by his side willingly and never run away again.

"Damian, what are you doing?" Tim's voice came from a distance, interrupting his thoughts.

Damian suddenly came back to his senses, and the dagger was accurately nailed in the middle of the wooden stake. He did not look back, but responded coldly: "Training."

Tim frowned, as if he wanted to say something, but in the end he just shrugged and left.

Damian's eyes drifted towards the isolation room again. Although separated by the thick wall, he seemed to be able to feel your presence.

He took a deep breath and suppressed the burning impulse in his heart. Batman may think this is a simple arrest, but for him, it is a beginning.

He will make you know that you belong to him - not just tonight, but forever.