I'm not exactly sure where it was filmed. It could have been anywhere with a nice beach and suitable filming conditions. Maybe you can check the movie's credits or some behind-the-scenes information for a precise location.
I'm not sure which novel or storyline you're referring to. If you can provide more information or context, I will try my best to provide you with a more accurate answer.
Overall, the ending of Nisekoi ties up loose ends and brings a sense of closure. The characters' relationships evolve in a way that satisfies most fans. There are some surprises along the way, but it all leads to a fulfilling conclusion.
Sure, the Nisekoi manga has reached its conclusion. The ending wrapped up the storylines and provided closure for the characters and their relationships.
The ending of Nisekoi manga is a bit complex. The main characters' relationships resolve in a way that some find satisfying, while others have mixed feelings.