Isn't it very crude for parents to decide their children's life privately? ~Our hero and heroine think the same as everyone else! That means it must be very tacky, and no one will agree to it, right?
The fathers of the two protagonists are family friends. When the two mothers were pregnant, they said that if they were both boys or girls, they would be super sisters or super buddies. (Weird) But if there is a boy and a girl, the two families become in-laws!
In this way, the two children cried at the same time, minute and second. God allowed the second possibility they said.
The parents of the two families kept the two children a secret for 15 years. (Originally I wanted to hide it for 18 years, but I still had to tell this fact early due to unavoidable reasons) But who knows...
To predict what will happen next, please read Oudi's novels~^0^