A two-versus-two match.
When Simon first challenged Satoshi to a match, he was never expecting anyone else to challenge them. He couldn't believe that Satoshi's classmates from Class 3-1 would get to invite him to a match as well, and the notion made his jaw drop to the ground in his amazement. He always wished to train with Class 3-1, one of them, at the very least. And right now, not only did he experience fighting with Satoshi, but he'd also experience fighting alongside him.
"Sure, why not." Satoshi let out an exhale as he smiled at Shiroi. The last time they fought was during the first day of school and needless to say, the competition was too anticlimactic to the point that everyone remembered it for all the wrong reasons. Both of them shouted their surrender, after all, and Satoshi was just lucky that Shiroi said it first before him.