Tong, Tong, Tong, Tong —

On the left side of the observation deck was a leather drum, which Mr. X personally beat with two objects that looked like giant fishbones. The third sound of the war drum signaled the start of the challenge. Hearing the sound of the drum, Zero, who had been sitting in the arena with his eyes closed, opened his eyes and slowly stood up.

On the other side of the arena, the captain with number 1 on his face said with a grin, "It's finally ...