Why do teachers have cars in these episodes?

One day, Ichiro Sato, an ordinary high school student, entered the single room in the men's toilet, only to find that a teacher named "Ghost Island" was there for some reason.

The lock is broken, and two people locked in a single room have a pee fight! The next day, in the clinic, the two met again! In order to take care of teacher Kojima with a fever, Sato went to find medicine.

2, the second episode

Sato, who was caught in a rain, rushed into the coin-operated laundry to hide from the rain and saw Mr. Kojima who was wet by the rain! Teacher Kojima, who is unexpectedly afraid of thunder, wants to repair the current circuit breaker that fell due to lightning strike.

During the summer vacation, Teacher Kojima came to Sato's hometown to take care of the children's sister Xu Shi.

3, the fourth episode

In order to attend the wedding of acquaintances, the Sato family came to the South Island. But somehow, Miss Kojima was there!

Before the wedding, Sato and Kojima were playing at the seaside. Kojima slipped on the beach and seemed to be bitten by something. Sato got up to save his favorite teacher.