It's hard to say exactly without reading it, but often in manga, a specific chapter like 33 can bring a new element to the story. It could be a new conflict, a resolution to an existing one, or a moment of growth for the characters. Maybe it even sets the stage for a new arc in the series.
Chapter 33 might deepen the relationship between the main characters or advance the overall plot. It could also provide new insights or challenges for them. Sometimes, it could just be a buildup to a major event in the later chapters.