It describes that the male protagonist and the female protagonist have been childhood sweethearts, HE in front and BE in the back. They knew each other when they were young and laid a strong foundation for their relationship in the future. Everyone knows how prosperous they were later, but they exchanged souls in a special incident... I wanted to see the other person, but the person I met was also the other person but not the other person (no typo)
Intention: How can there be so many wishes in life?