Well the GREAT mystery in this story is : does Katsuragi really has the blood of the Kuze family ? Why did Akihito's grand father gave the baby to the Katsuragi' ? Maybe because he thought he wasn't his son. I think Katsuragi is the natural son of Shizu and Takamasa Katsuragi and doesn't have a single drop of blood of the Kuze family.
Of course, this is just my opinion...
Oh my I expect I don't spoil! I'm sorry as the book is licensed in my country I read vol.7 and thera a no real revelation in it but thera are yet some important informations... I'm really sorry I didn't realize...
ohoo its okei ...thanx by the way
i mean Katsuragi has same blood of Kuze family and Akihitoh also and also katsuragi his father's brother then t means they are uncle and nephew...now its incest.....hmm