Stiles is flicking paper footballs at someone's head in homeroom, which is, in his opinion, a productive morning. If he can't learn magic, and he has to deal with cardcaptors and sorcerers and bears...well, he'll make his own fun.
"But shouldn't it be active all day now? Or is it just active when it does its thing?"
"I guess it might be active all day now? Even with time travel, I kind of thought it would just activate when it activates."
"What, and skip afternoon classes? But what about getting an education?" he asks lightly, and follows.
"You had the classes already, that's a pretty good excuse. Just tell your teachers you time travelled your way through the year and now you don't have to show up."
"Wouldn't even be a lie, we did in fact sorta time travel—makes me wonder how the physics of this all works, really..."
"Maybe magic explains all the parts of physics that don't line up. The thing that's ruining all the models."
"You can do science after we've solved the problem, unless you think it's going to help with that part."
"He kind of is. Any suggestions on how to get future you to ask less questions, since you're going to forget things every time we have to repeat today?"
"That sounds like a lot of work. We could just wait until this day is over and tell you then?"