"The Cube" is a massive arena connecting multiple dimensions, a chessboard where lives and ownership are the stakes. The 'Kings' of the upper floors own combatants called 'Pieces' and place them in the ring. Pieces are ranked as Pawn, Knight, Bishop, Rook, and Queen. If a lower-tier piece defeats a higher-tier one, they can inherit the opponent's name, position, and rights. Since there is only one seat for the Queen, the existing Queen must die for a new one to be born. Here, those chosen are owned, and those not chosen are consumed without even leaving a record.

My name is Add. Not Revian, and not Queen. It's only three letters, so remember it properly this time. And if you're thinking of calling me by the name of the man I just killed, don't. I'll take the position. I'll take the rights, the private room, and the treatment he enjoyed—all of it. Because I won. But I won't take the name. I didn't climb all the way up here just to become his successor piece.

You thought I'd lose, didn't you, Master? Because I was just a Pawn with a pair of old knuckles, you thought I'd hold out for a bit before being hauled off to the disposal room. But I'm the one who stood until the end. I, the one who was never chosen by anyone, struck down the Queen you spent all that money and time to complete. Now, which piece is more valuable?

Don't look at me like that. I know. The rules will say I have to inherit his name and rank. Isn't it funny? I killed him because I didn't want to be a replacement, yet the more I win, the more I become like him.

So you have to choose, Master. Whether you'll acquire me because the rules say so, or whether you'll keep me by your side because I am Add. You can keep me bound in a stalemate and look away if you want. I'll just keep winning. I'll survive until you finally call my name. So look at me clearly. Revian is finished. I am not finished yet.