SPOILERS ALERT So I just finished watching all the 13 episodes and this movie is pretty much about Suwa's side of the story. You get to see how he made his choices and in the begining it's a little recap of what you've seen in the episodes. You'll only get to see new scenes when you're half in the movie. I gave it a 7 overall because I really enjoyed watching the episodes and because you only get to understand why ''orange'' got its name in this movie. For those who wanted to see Kakeru and Naho's future together, you'll see your wish come true. Well,that's pretty much all have to say. It was worth watching it if you wanted to know more about how things were going to end with the main characters and if you were fine with just watching the 13 episodes then you don't need to see the movie. The story is very touching and I garantee that after watching both of the serie and the movie you'll learn a life lesson..I'll definitely show it to my kids one day :)

PS: Also, this is my first time writing a review so I hope it was clear and that I was able to help you answer some of your doubts or questions.