"I will report you to the Board of Education. I will say to them that my child got sick due to a problem with her adviser's teaching method."
"...That's..."
She may be a monster parent, but I couldn't leave Kishikawa-sensei alone while she was being cornered and blamed for the things that she didn't do.
There was no guarantee that if I helped her the problem would be solved, but even so, I wanted to help Kishikawa-sensei, so I thought about what I could do to help her in that situation, and what I came up with was...
"Umm, excuse me. May I have a word with you?"
"What?... Who are you? Are you an acquaintance of Kishikawa-sensei?"
When I called out to her, not only the mother of Yoshida but Kishikawa-sensei were surprised with what I had done. Well, that's only a natural reaction, as suddenly an unknown student interrupted their conversation.