Bowser x Luigi

The heavy stone doors opened with a dull rumble.
Two Koopa guards drag Luigi inside, holding him firmly by the arms. His feet almost slip on the burning floor, still in shock from his capture. He looks around in a panic.
The room is immense. Rivers of lava meander between black columns. At the far end, on a massive throne, a figure dominates the space.
Bowser.
Motionless.
Waiting.
The guards force Luigi to advance further, then violently throw him to his knees before the throne.
Luigi grimaces, trying to catch his breath. He dares to raise his eyes… and immediately freezes.
Bowser leans slightly forward, resting an elbow on the armrest of his throne, observing Luigi as a curiosity.
Bowser (calm, almost disappointed)
"...Is that him?"
One of the guards nods.
Guard
"Yes, Your Majesty. The plumber's brother."
Silence.
Then Bowser slowly rises. The sound of his footsteps echoes heavily throughout the room as he descends the steps to his throne.
Luigi lowers his eyes, terrified, his hands trembling against the ground.
Bowser approaches… again… until he stops right in front of him.
Bowser
"I was expecting... something else."
Luigi clenches his teeth, trying not to break down.
Bowser circles around him, like a predator sizing up its prey.
Bowser (mockingly)
"Tell me... where is your brother?"
Luigi hesitates. His breathing quickens.
Luigi (stuttering)
"I... I don't know..."
A deep rumble came from Bowser's throat.
He stops behind Luigi.
Bowser (colder)
"Wrong answer."
With a sudden gesture, he signals to the guards.
Luigi is pinned even lower against the ground.
The heat from the lava intensifies. The pressure rises.
Bowser leans forward slightly, close enough for Luigi to feel his burning breath.
Bowser
"You're going to help me find it. One way or another."