The woman belongs to a wealthy businessman, but he is just a country boy who was frail and sick since he was a child. In order to fulfill his promise to his late grandfather, he had to marry into a wealthy family as his son-in-law... Five years after his disappearance, he was taken to a mysterious island for training by an expert... When everyone thought he was still the sick man five years ago, in fact, he had grown into a king of soldiers... His personality and temperament had also changed from being weak and fearful to being aggressive and decisive!
I can write well and can read.
Author, will you have a harem?