Nybras was just confused by the...lesson? not that he didn't understand it, more that he didn't get why this particular thing was the lesson. Still as a bell rung and another person appeared and call their teacher away he put it aside for now in favor of a lunch break, not having been aware of just how long they been at this. As he was still holding the succubus' hand he favored her with a light smile and asked "would you...like to eat together?"