1. Twin spirits are originally from the same soul. After falling into the mortal realm, the two will become mortals, meet and fall in love with each other, just like the couple in the previous life, with an unswerving love.
2. The deeper their love and the heavier their bond with each other, the stronger the "dust" around them will be - the dust will gnaw at their souls, wear away their memories, and burn their bones and blood.
3. The pain of earthly calamity is "the same heartache, the same birth and grinding"...
Mission: May God bring people together