Someday or One Day(2019)

Someday or One Day is a Taiwanese science-fiction romance series that follows Yu-Hsuan, a woman grieving her boyfriend Chuan-Sheng after a tragic plane accident. While investigating her loss, she discovers a mysterious photograph from 1998 showing Chuan-Sheng and a girl who looks identical to her. The discovery triggers an unexpected journey back in time, where Yu-Hsuan encounters a boy who bears an uncanny resemblance to her lost love. As she navigates this strange new reality, Yu-Hsuan must uncover the connection between past and present, questioning whether fate has given her a second chance or if something far more complex is at play. The series weaves together mystery, romance, and temporal intrigue as it explores themes of destiny and second chances across decades.