you maybe missed it, because of the fights, but ahiru explained everything few pages before...
Miyavi
yes, they have in contract that they can not speak about their private affairs, because it can influence the number of fans, and they aren´t allowed to have officially a girlfriend or wife, because that means breaking the contract.
If they have one, or kids, they have to "hide" it.
And I do well believe, tat there are many Jrockers (even in other companies) that are wed/have children, but don´t speak about it.
SO it is possible, that your heart goes broken again crys. It is not wise to have affectionate feelings to any japanese star (and I have learned my lecture as well).