He tends to have trouble with Nagisa, a student of his, as she does not make an effort to prepare for his class. In the first episode, Miyashita calls on a dozing Nagisa to answer a problem on the blackboard, which she is unable to do, disappointing him as he reminds her that she's a second-year junior high student and thus should know the answer. However, Honoka steps in, noting that Nagisa wouldn't be able to solve the problem as Miyashita wrote it in an erroneous way. He is embarrassed, but notes that he will be more careful in the future.