https://en.wikipedia.org/wiki/Ninomiya_Sontoku
page 11 :
- main girl : ... baa-chan / dear grandma ...
page 12 :
i guess you can say : a rock hits a rock-and-roll singer , lol , pun .
page 15 :
- main girl : what are you doing , babaa / old hag ?
page 16 :
- class rep girl : ... mai-chan ...
last pages :
- old , fat guy : ... the rest is up to you , nii-chan ... , seiko-san ...
previous chapter , old fat guy said : as if you could pull this big cart by yourself , weak kid . we are strong adults .
this chapter , old fat guy says : now you have to pull this big cart by yourself , weak kid .
i guess the mangaka kicks the 6 old fat guys out of this chapter so he doesnt have to draw them anymore , lol .