Juunen Saki mo Kimi ni Koishite

The story focuses on 26-year-old Rika (Ueto), a single editor who is unskilled in love. The story starts when a man (Uchino) appears before her, telling her that he is her husband from 10 years in the future. He informs her that she will meet the young version of himself in a few days, but begs her not to marry him.