This episode is mainly about the vice principle and this kid entering in the marathon. So each year the school needs to have 1 female and 1 male student to participate in the marathon. The female student was decided but male student was randomly chosen. This guy in Sugi-sensei class agrees to participate but he actually not good at long distance running.
So he started taking the marathon seriously and even practice until late at night. But because of this his mother complained to the school and the vice principle complained to Sugi-sensei and blah… blah… blah…
The problem with the vice principle is that everyone doesn’t treat him like the vice principle of the school, he does jobs that aren’t meant to be done by him and students doesn’t respect him. With Sugi-sensei being so supportive to his student participating the marathon he was persuaded to write a report to the whatever teaching thing but almost half of the report was made up.
So at the end that guy finish the marathon even though he hurt his leg, those gave the vice principle a lesson which made him throw the report away.
Yamada gets cuter in each episode, I love the last part where he was covering his ears with his hand and singing. The expression he made right at the end is just so cute!