She would miss her train and wait half-an-hour for the next one. He would arrive in his train 15 minutes later and miss the next train to wait half-an-hour. They would share a bench and their lives until her train arrives and she leaves. He would then spend the next 15 minutes alone waiting for his train.
15 minutes alone-15 minutes together-15 minutes alone. Love blooms even at the cross-roads.