I started reading this expecting a comedy-romance between an ex-delinquent and her teacher. You can kind of imagine it there, but it is definitely not the fore-front of this manga. If you're looking for a cute rom-com this is not the story for you.
This story is mostly comedic about the adventures of the delinquent Mafuyu and the people she meets at her new school. You can literally ship her with almost any character you want because there's no real romance between her and any of the characters. Her relationship with most males in the story is (unwanted) friendship, rivalry or sort of sibling-like.
A lot of characters respect Mafuyu and some go out of their way to protect her, but nothing has escalated more than friendship. In fact, everything is so far from love that anyone's guess on who she will end up with can't totally be denied.
However, the tags seems to favor a relationship between her and Takaomi, which is what I'm rooting for and they do have the most history together. However, there hasn't really been any development.
This story is suuuuuper slow-paced. It would probably be better as an anime because reading chapter after chapter of random adventures is a little redundant. However the comedy is absolute gold and I laugh almost every chapter. This makes it worth reading. Plus it's fun to wait and wonder when some romance will develop.