Ashita ga Aru Kara (1991)

Reiko, a 28 year-old office girl, wants to marry her boyfriend, 35 year-old Kenta who works in the same office. However, the situation becomes quite complicated when the young woman is promoted to manage a major project. Reiko is left feeling lost and helpless before this unexpected move by the company president. Did her father have a secret agreement with the president? Will the future hold any happiness for her?