Tokyo Air Raid (季节 1)

When Sakuragi Haruko's father's factory is bombed, Oba Hiroto stops Haruko when she tries to rescue her father from the fire. They meet again a few years later when Haruko is working as a nurse and Hiroto is brought in as a patient with a heart condition. The second couple is a Korean man, Boku Hitoshi, and another nurse, Yamada Kazue