Love letters sent across timelines Falling for someone in an alternate past Shared memories in diverging futures Meeting in forbidden time zones Destined lovers in collapsing timelines Timekeeper forbids romantic entanglements First kiss causes a paradox Accidental reunion centuries apart Future version warns of heartbreak Timeline reset erases love story Soulmates born in mismatched eras Hidden love in secret time loops Time-travel device linked to their hearts Eternal vow through endless timelines Past selves sabotage future love