@sirflimflam and writing like this is why I legitimately despise manga. The Japanese do not have a word for "pacing," apparently, given how nothing happens in almost any of their stories.
If they don't have any ideas left, end the series and move on to the next one. Of course, publishers will never allow that, because Japanese otaku are such consoomers that they will keep buying the same repetitive trash they've already read a thousand times over and over and over again, so those artists and authors better keep the story going at all costs, or else they won't milk as much money as possible out of those children.