Answer and Explanation:
Although you did not present the excerpt to which the question refers, we can say that Juna's grandmother reacts differently to the school ticket, because she has very high hopes for Junas's future, in addition to being very proud of whom Junas It is to make sure that Junas was a good student and that he would succeed in his life.
In short, her feeling for Juna is what makes the difference in her reaction.