Responses
maybe because some people thought it's possible to have extra chapters and a sequel after the manga so to clearly tell people "this is done, there"ll be no more of this story" they made it clearer in the anime (?). Or it could be simply because they wanted to hit a certain length for the movie and just chose to add that scene...

Honestly, I wish this didn't exist. I love the manga and 3 anime seasons but the way this ended with Kagami leaving is the worst. I know in real life that happens and everyone should look to get to the best place to improve themselves and all that stuff but I don't read a manga about supernatural moves, sharingan eyes and unlocking god like powers to see realistic stuff. Reality is depressing which is why I read manga. I don't need this to give me depression as well