You can try checking some official manga platforms like Viz Media if they have the rights to it. Sometimes, local comic book stores might also have physical copies if it has been published in that format.
Nisekoi After Story would most likely build on the original plot of Nisekoi. The main characters who were in a fake relationship in the original might face new challenges that test their real feelings for each other. There could be more exploration of their backstories, their families' influence on their relationships, and how they grow as individuals while dealing with their complex love situation. It might also show how their friendships with other characters evolve as a result of the relationship drama.
One option could be to check out dedicated manga websites such as MangaFox or MangaReader. Sometimes they have the complete series of Nisekoi. Just make sure the sites are legal and safe to use.
One popular nisekoi fanfic is 'The Unforeseen Bond'. It explores the characters in new and interesting ways. Another great one could be 'A Different Promise' which delves deeper into the relationships between the main characters.
You can try looking on popular manga reading websites like MangaReader or MangaPark. They usually have a wide range of manga available, including Nisekoi.
It's about a love story filled with misunderstandings and complex relationships. The main character gets involved in a fake relationship which gradually evolves into something more complicated and emotional.
In 'nisekoi ending story', it probably concludes the complex love triangle and other sub - plots. Maybe it shows how the main characters finally make their relationship choices and how their friends and family react to those choices. It could also deal with any unfinished business in the story, like resolving conflicts between different groups or dealing with secrets that were still hanging in the air.