Just one thought, and I missed twelve years. No one said anything, no one asked, they hid their love for each other as the deepest secret.
Family marriage tied them together, and the two people, who had their own concerns, signed a three-year agreement. He thought she didn't love him, so he didn't dare to get close; she thought he didn't love her, so she didn't dare to hope.
They are obviously the closest people, but they live like the strangest couple. They obviously love each other deeply, but they push each other further and further away.