Yes, I already read something about the manga version of that scene. Although Matsuribayashi-hen seems to be the "happy ending chapter", it still contains a lot of cruelty, some of it seem a bit exaggerated to me, for example
And I wonder if you can, in the end, still call it a real happy ending because no-one will bring the people back who died earlier because of the "curse" and they didn't deserve to die as well as Rika and her friends.