Aww, perhaps Mayumi was hoping for something else…? Yamato is a total sweetie, though.
He actually made that entire notebook for her, including all kinds of doodles to cheer her up (which I will now have to design the next time the notebook makes an appearance after this chapter). It's not so much that's she's hoping for something else as that's she's speechless that he took the time to compile a notebook for her, so she can still study for upcoming school exams.
Awww, he really is a sweetie!! Can't wait to see that notebook (muahahahahahahaha) Has she been absent because she's been working at the supermarket, then?