Does anyone else get the feeling that the parents are serial killers or something and straight up adopted her thinking/knowing she was the one who set the original fire? Would be a cool twist.
@nikonekonya My theory is they rather adopted her because they thought she was harmless and wanted to be the "perfect family". Which is why the mom was trying to cover up the "murder" and the dad's reaction to Soo-yeon. But anything could be possible~