They missed each other.
He thought his love had been rejected, so he gave up out of cowardice.
She thought she was only a substitute, so she didn't respond out of weakness.
By the time they resolved their misunderstandings years later, he was already married.
Her unhappiness, his compassion.
In the end, they crossed the line of morality.
He and she kept avoiding each other.
Longing, and in the end, a beautiful woman!