Well, the 'Don't Toy with Me, Miss Nagatoro' manga is indeed finished. Fans have had the opportunity to follow the story from start to finish and see how it all wrapped up.
There are also some side characters in the light novel. However, Nagatoro and the male lead are the central focus. Their relationship dynamic, with Nagatoro's teasing and the male lead's reactions, forms the core of the story.
Overall, the ending of the manga wraps up the story nicely. It resolves the main conflicts and gives a clear direction to the characters' futures. There are some surprises along the way that keep you engaged till the end.
I'm not sure exactly as I haven't read that specific chapter. But usually, it might have new developments in the relationship between the characters or some exciting plot twists.