Manga by author Na Gang-on - Status ongoing

It's my 10th birthday. I remember that this world is a fantasy novel along with my past life. I even remember that my family will be torn apart by a hidden enemy!For the peace of my family and my comfortable life, wouldn't it be enough to raise the abandoned prince, the potential hidden enemy, well?So I started early education for the hidden enemy by visiting him every day!...But I've raised him way too well...?