Heroes versus villains is a self-explanatory game where one side acts as the villain, and the other would act as a hero. Usually, this practical training is set up with two people on each side. One side would play the role of the heroes and act like the superheroes they deemed to be one day, and the other side would portray the roles of villains and embrace their inner antagonists.
"And let me guess... we're going to do this with Light Wing and Dark Matter," Midori mumbled under his breath as the group walked inside the Concrete Arena.
Satoshi and the others nodded along since it was pretty obvious that such was the case. They really were going against two of the most powerful fourth-year students in SAO. While this wasn't the first time that something like this happened in school, this was a new thing for their class, and they couldn't help but feel nervous.