So I decided to reread some, and I found the neatest thing. So, that bit in ch. 98, after the mom has left, when Miss Sunflower sees Matsuri just as the bus pulls up, and wants to see her so much that she yells out "Matsuri!" and Matsuri doesn't get on the bus and runs to her after the bus leaves and it's this great moment of Miss Sunflower taking the initiative.
Ch. 5 has almost the same scene!
It's the first time Miss Sunflower has the feeling that it's kind of quiet and "off" with Matsuri not there for a while, and she walks out of the store, and happens to see Matsuri catching the bus. But since this is the first time and Miss Sunflower's feelings have a lot of evolving to do, she doesn't call out. Matsuri does! She spots Miss Sunflower, lets the bus leave without her and yells out "MISS SUNFLOWER!" and goes to her. So like, the later scene is totally a re-do showing the development, with Miss Sunflower so much more fond of Matsuri and so much more aware of it and so much more capable of expressing herself. Isn't that cool? This manga is so awesome.