This partner could be the offspring of a government official, or the relative of the leader of a large consortium in the world.
All in all, they were either rich or noble people.
In order to ensure that nothing would go wrong between their marriage, they would inject poison into each other's body when they had just been born once they were assigned with partners.
This type of poison left from the previous dynasty was kept by the Hamden family
The poison could be broken down into two elements, they lived or died at the same time. One was planted on the woman's body, and the other on the man's body.
The effects of the poison could only be reversed when they had intercourse with each other after their marriage.
On the contrary, if the two of them did not end up together, the poison would spread in their bodies until they died in great pain.