First of all i hate it when authors leave their works with cliffhangers like the one at the end of this one. For instance:

That watch that otoya has may prove that J is his brother [half brother?] which would mean that his mother had an affair or something like that [although i don't know if they are the same age or not as if J was older then it could have been before her marriage.] However, then this must mean that the prime minister is not her father, since he may not have known that she gave birth to another child. So otoya's dad must be the prime minister's son? possibly [Or she could have donated an egg like that scientist munka...]
I can't wait to read the sequel...but it's gonna go on for years like berserk...probably...