There's 4 different storylines and endings to each route, each has a different depth of the story.
Recommend gameplay: Makiri→Dickens→Kurumi→Hinako
spoiler: There will be a fifth ending after completing all 4 routes
*Note: in order to get the "Threaten her with violence" option, you must gain more than 10 violence.
Each attack during battle will gain you 1 violence, which means you will need to attack 10 times in total in order to get into Kurumi's route.
You can check your violence status after finishing any route's ending.