Clean up / Multiplication tables / Motivation / Bring out your motivation

We see mom scolding Bunji for not cleaning up even though she hates doing it herself; After cleaning, they take out an electronic multiplication table that Fumi and Bunji start playing with. Mom is a bit hesitant since she is not so good with the multiplication table; One day, Mom is surprised when Bunji states his desire to study so she takes him to the hospital where they find nothing wrong with him. But, is there anything wrong with his body?