Sarah might be incredulous in the fifth panel concerning the fantasy-ish sounding rules, but I wanna know why The Sensei felt the need to put those other two in. We know for a fact that Nanase can use magic and she has used it for combat. Likewise for some reason The Sensei was under the impression that Elliot actually could summon inner demons. Both of those rules are things that Nanase and Elliot might have gotten reputations in the dojo for. So does that imply that Nanase has a reputation for low-blows? And Elliot has a reputation for, um... breast punches? Or would his reputation be something more along the lines of something Happosai was known for

It also makes me wonder if that is the case how they managed to get those reputations in the first place. Well, they used to be a couple. so it could be that some of the other students overheard some conversation between the two and mistook the mention of... certain actions... for martial arts techniques they'd use when practicing in private*.
*Please note that I am well aware that Nanase and Elliot never went that far. That was a joke. I swear, the first person that tries to state that I'm wrong and those two never went further than making out in the movie theater is going to get smashed by a concrete donkey.