Slip-up High School #WeeklyShortShortNote

"It's not even a safety school. It's a Slip-up High School!" Father said coldly after seeing the entrance exam results.
...Slip-up High School, huh? On the morning of my first day, I was in the classroom feeling depressed. Then, right as the bell rang, a teacher walked in.
"I'm Nakamura, your homeroom teacher. A life without any slip-ups isn't interesting. From now on, let's go find the punchline together with me!"
He speaks in a Kansai dialect, he talks about punchlines—what is up with this teacher?
The next day, the teacher spoke to us passionately again.
"It's painful when you don't get a laugh. But slip-ups become assets later on. A time will come when you can laugh about having slipped up!" No, we aren't comedy students, though...
The next day. The classroom was noisy from the morning because of our annoying homeroom teacher. Then, right at the start of class, Mr. Nakamura burst in. "Believe in yourself! Show your true self!" We were stunned by the teacher's appearance. "Why are you naked!" The teacher scratched his head, saying he was terribly sorry. "Teacher, you're slipping up big time," we said, poking fun at him with a smile.

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I am participating in Tarahakani-sama's project. This was a difficult prompt again, wasn't it? In the past, youth dramas were often broadcast. I borrowed a bit of that image.
I look forward to everyone's work.