Got curious so I looked it up. Here's a short spoiler i copied from someone in novel updates :)
ML's mother and FL's father were the real villains in this story. All the pain and sh*t that went down was because of them.
ML's mother (Charlotte) betrayed ML's father and let FL's father (Peter) kill him. Then she left the household and found another man and tried to milk him out as well. This all happened when ML was a kid, and when he grew up and brought the household back to its glory, this MF had the audacity to come back and try to take it from her son. FL's father, on the other hand, was just as bad. Basically, he raped FL's mother or really mistreated her, got her pregnant, then got kicked out of Korea (there's a fictional name in the novel). FL's grandfather stepped in and became her father. FL's father came back and killed everyone (grandfather, FL's teacher) and burned the house freaking down. For some god damn reason, later he decided to take the grandfather's corpse as well.
Now our FL had to go to the country the ML was in to look for her father so she could properly bury her grandfather. Basically, this was what connected the ML and FL. FL knew her father was a MF*ker and wanted to atone for her sin of being his kid- hence the title of the story. She lived her life as a sinner. The other MF*ker in the story was the King and his backstory was basically really hating the ML and wanted to take everything from him. He's more the Anson of the story if you read the other novel
Got curious so I looked it up. Here's a short spoiler i copied from someone in novel updates :)
ML's mother and FL's father were the real villains in this story. All the pain and sh*t that went down was because of them.
ML's mother (Charlotte) betrayed ML's father and let FL's father (Peter) kill him.
Then she left the household and found another man and tried to milk him out as well.
This all happened when ML was a kid, and when he grew up and brought the household back to its glory, this MF had the audacity to come back and try to take it from her son.
FL's father, on the other hand, was just as bad.
Basically, he raped FL's mother or really mistreated her, got her pregnant, then got kicked out of Korea (there's a fictional name in the novel).
FL's grandfather stepped in and became her father.
FL's father came back and killed everyone (grandfather, FL's teacher) and burned the house freaking down.
For some god damn reason, later he decided to take the grandfather's corpse as well.
Now our FL had to go to the country the ML was in to look for her father so she could properly bury her grandfather.
Basically, this was what connected the ML and FL. FL knew her father was a MF*ker and wanted to atone for her sin of being his kid- hence the title of the story. She lived her life as a sinner. The other MF*ker in the story was the King and his backstory was basically really hating the ML and wanted to take everything from him. He's more the Anson of the story if you read the other novel