Aitai Toki ni Anata wa Inai(1991)

逢いたい時にあなたはいない…

Miyoko and Yusuke love each other. But Yusuke is told to work in Hokkaido where is far from Tokyo for a year. They cannot meet often. There appear another woman and man in front of each of them. They almost lose confidence to keep their relationship but finally they make sure of their love.