The rules specified that as long as an opponent wasn't knocked out or didn't surrender, he could swap out with his teammate and still fight in the next match. It was like a tamed beast battle, and Dark Matter decided to use that rule in order to gain an advantage against Jonathan and Kurogami.
At first, he thought that Kuorgami was going to win since he managed to grab Light Wing by the neck. However, to his surprise, Kurogami really did drop out of the match as soon as the two minutes were up. He could've swapped with Jonathan just like Dark Matter did... but he didn't.
He was a man of his word. He said he was going to surrender the match when he couldn't defeat Light Wing in two minutes. And that's what he did.
"You're going to fight me. I'm swapping with Light Wing. You can fight her after you defeat me."
"It doesn't matter. I'm going to win anyway."
Jonathan the rizzmaster ahah~ sheesh~
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