Even if you start all over again, it means that you have to go back to the same path. This is the first time we see that the students are back in the classroom, and they're all excited to get back to their studies. They're also excited because they've got a new teacher coming in a few days, so they don't have to worry about cramming for the test. They also have a snack at the cafe, which has a 12 percent discount on food and drink. The girl is confused because she didn't take advantage of the discount, but she's not sure why.