In this world, there will always be two people like this. He and she are destined to be two parallel lines, either looking at each other, or forgetting each other. They know clearly that they will be happy if they choose the latter, but they suffer from the inability to forget and fall into a lifetime of watching, watching for a love that is elusive but unattainable. They do not ask for results, but only hope to be unforgettable in this life.
In this world, there are too few stories of lovers getting married. If marriage is the result of a relationship, then a man always hopes that his result will be a woman he loves, and a woman hopes that her result will be a man who loves her. If each takes what he needs, supply and demand are balanced, then marriage in this society will be perfect.
But is perfection happiness?
Who cares.