Overall, it's a pleasant read. I don't know what the author's intentions were, whether this was the entire plan or she had something else in mind, but it likely needed an additional five to ten chapters to smooth out the central bullying premise. I mean, even the protagonist was like, "Oh that was weird... but it's over now" when they were taking the teacher away.
Ah well, I'm used to a little silliness by now. And, although I get the weight loss is not everyone's cup of tea, Shizuka sure looks pretty darn cute in this chapter. Welp, a happy ending and all's well that ends well. Bon appétit!