Mondai no Nai Watashi-tachi

From Perfect Illusions:

In this series, the main character becomes a target after she sticks up for another girl, but manages to turn it around and make the head 'mean girl' teased instead. Then she has to take on a teacher, who accuses her of shoplifting to cover up her own theft. Most of the victims crawl up into a ball, stop going to school, or just become loners but not in Mondai. It is the story of becoming friends and the different relationships between them.