Ben nodded at Shiro's introduction, but didn't pay much attention once the Faunus started to talk with his own teammate instead. He took a look, instead, at the textbook pages in front of him. Derivatives, mostly, by the look of it. A few limit definition of derivative problems, and then a page of functions to derive. Simple enough stuff. If he had to guess he would have said they probably covered limits the week before, so they were moving on. Fortunately, he hadn't been lying; he [i]was[/i] familiar with the work. Skipping over the definition problems, he'd come back to them later, he started in on the derivatives.

Until noticing, a few minutes later, that Sangue seemed to be having trouble staying awake. Scooting over in his chair slightly, he lowered his voice to address her without drawing too much attention.

"Hey, Sangue. You alright?"