I'll Still Love You in 10 Years(2010)

I'll Still Love You in 10 Years is a Japanese romance series following Rika, a 26-year-old editor struggling with matters of the heart. Her life takes an unexpected turn when a man appears claiming to be her husband from a decade in the future. He warns her against marrying his younger self, who she's about to meet. Caught between the mysterious visitor's pleas and her own feelings, Rika must navigate a love story that spans across time itself. The series explores whether fate can be rewritten and what it truly means to choose love when you know how the story ends.