ok at this point I'm prety sure the mother wrote the novel
it's turning more and more into a power trip, he faces no challenges and everyting is handed to him conveniently.
When I read the novel, I never thought Dokja mother is actually very hot
Anyway, Major Spoiler so open it at your own risk
Dokja mother is not the one who killed his father. It's kinda complicated, but to overly simplify it.
Dokja dad is abusive toward his family.
Dokja have enough one day and killed his dad when he's abusing his mother.
Dokja fainted.
when he's awake he forgot/confused about what has happened.
mom took that as an advantage and twist the murder scene so it's looks like she is the one who murder her husband and got jailed for it.
Mom wrote a novel about how and why she killed her husband and it got super popular.
The reason she did that is so Kim Dokja wouldn't be discovered as the killer, even by Kim Dokja own self.
Everyone now believe she is the killer. She thought this is the best for Kim Dokja.
Time skip, it's actually not the best for Kim Dokja.
He got bullied hard because of her mother novel and his relatives doesn't want to take a murderer son in.
In his heart he actually don't mind her mother killed his father. Because his father is a shit.
But her novel makes kim dokja also infamous, which ruin his life.