It’s isekai manhwa when the fl keeps getting reincarnated to go up and finish the tower. When she does instead of going back to her own world she’s transmigrated into a different world (or novel) where she is a noble lady of swordsman family as a villainess. The og fl is missing and she is being suspected as her murderer.
I forgot to mark it in my list T.T
But leukemia is an incurable disease here too.