i know i've already shared my piece but make no mistake NONE of this is byul's fault! he's a kid who overheard things he wasn't told about and his natural curiosity to know his maternal family probably got him to contact his grandma. it doesnt help that he found out this mfking tool of a man named dojin was still in contact with said grandmother. they have lapses as parents as they didnt explain the situation to byul at all but sometimes its better not to mention it to a kid at a young age. so yeah definitely 100% it's dojin's fault again this time.