Before that happened, Nancha and Ji Zhunyi were just like every ordinary couple. Although everyone said that O and B could not last forever, they still persevered.
Until one day, the matching agency informed Nancha that someone's pheromones were a perfect match for him.
Later, everything changed, they were forced to break up, forced to get married, and then escaped to try to get revenge on that person. When Nan Cha looked back, everything had changed beyond recognition.
Demining: Change attack, give birth, O changes to B, B changes to O, etc.
The personality changes should be huge! The ending is probably OE, more HE.
Purpose: Make your own decisions about your own life