I dont know if this is right but im imagining the last page is their acting. They are still alive but in the movie Levi kills Eren. ^-^
shit im so srry what did i spoil? although i dont clearly remember, im pretty sure i was talking about them acting in the movie of this book and well u probably would have finished the book to head off to comments. sorry if i did somehow ruined something
ok so I was thinking this part of the fanfiction is just acting and not real since they are actors http://www.mangago.zone/read-manga/shingeki_no_kyojin_in_fiction_doujinshi/bt/306726/Ch0/23/
Thats was my interpretation too
pretty good. would love an explanation for the last page though