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Kill one off (the other can fall in love with the ghost) Show one dying alone in the future and set up the whole story as a flashback Put them on impossibly different locations (planets) or time (...
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#3: Attribution notice added
Source: https://writers.stackexchange.com/a/44330 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
- Kill one off (the other can fall in love with the ghost) - Show one dying alone in the future and set up the whole story as a flashback - Put them on impossibly different locations (planets) or time (like centuries apart, aka: time traveling or back to the ghost thing) - Put one or both in a relationship with someone else - Make them mortal enemies (cultural, values, political) - Have more than 2 characters