Time travel / parallel universe dramas

ML gets transferred and meets FL in a parallel world , his own comic book

FL gets transferred in  a parallel world and  meets the  ML there and also shares her body with her doppelganger

ML travels to modern world  to meet the FL who has no ideas about her identity and relationswith ML and ancient times

FL gets transferred into her own comic to meet the ML 

both ML and FL travel back in time as  they get trapped in the time vortex

SPOILERRRRRRRRR

FL is the author of the novel and the ML of the real world meets her in the ending scene

not any parallel world but instead a gaming world

FL is an alien who comes to earth 

FL  gets a chance to set her life right with the help of a future pill, as she  experiences time travel

maybe a spoiler..... the ML AMD FL ARE A PART OF A  STORY which is being told to us by the ML , albeit he and his love interest{ the FL only} are different characters

ML is a mutant who has reached earth 

same as  the  sleepless princess 

FL is a fairy formed from root , who is eaten up by the princess , her doppelganger , hence they share the body  

FL time travels 10 yrs back to meet the ML 

ML is a spirit and FL a heavenly soldier in her previous life