The ending point of the Undead Unluck anime in the manga can be quite variable. Sometimes, the anime might stop before reaching a major manga storyline or might consolidate certain elements. It really varies based on the production choices.
It's not based on a true story. The plot and characters were crafted by the writer for creative purposes rather than being drawn from real-life events.
One way could be to discuss it with others. Sharing your thoughts and listening to theirs might help you uncover aspects of the story that were previously hidden. Another approach is to re-read or re-examine the available information with a fresh perspective.
Well, you should pay attention to how the character's background and environment shape their journey. Also, the relationships they form and how they impact their growth. The novel also delves into issues of race and class.