Usually, studying together is fun. It's easier to stay focused with someone else. But right now, you're bored and you can tell Ace is getting bored too. You've already gone over all of the material in the classes the two of you share, to the point where you both can recite the information wors for word.

Now the two of you are just sitting in your dorm room (because Ace might as well live there at this point), and not actually re-reading material.