it´s real. What´s happening in the last pages are jang mi´s thoughts.
Basically, she´s recalling how she decided to live the best life she can and thinking about who should be her special person, she is saying that if that person actually exists should be someone who has suffered as much as her and thinks that the best for that person would be actually not to exist because in that way the fated person would not suffer or deal with her. But if that person actually exists and both find each other jang mi has decided to fight for them and their happiness.
The last page is basically the author showing that indeed they are both fated for each other.
Hence the title
i don’t really get the last part??? i was really confused!! is the whole thing real or it was just jang mi’s imagination??? AAHHHHKKK CAN SOMEONE EXPLAIN!!!