From "contracted couple, non-interference with each other" to "limited cooperation, testing each other", to "common heart, life and death together", and finally "soul mates, sharing glory".
Concept: "Dislocation" is the appearance, "two-way redemption" is the core. This is a huge gamble starting from "wrong marriage". If the gamble wins, you will change from a chess piece to a chess player, and from an abandoned piece to a chess player.