Board Thread:Wiki/@comment-30049797-20160924003216/@comment-5774380-20161001035040

Tdfern14 wrote:

Yeah but I am saying like naturally or is that legal in real life?

That again depends of the law of each country. In most of the world it is forbidden; but as for Japan, it seems to be legal or at least a gray area, as it only forbids marriage between adopted child and adoptive parent but it says nothing about adoptive siblings:

Prohibition of marriage between adopted child and adoptive parent

Article 736. No marriage may be effected between an adopted child, his or her spouse, his or her lineal descendants or their spouses on the one hand, and the parent by adoption or his or her lineal ascendants on the other, even after the relationship has ceased in accordance with the provisions of Article 729. [1]

I've heard rumors that this kind of relationships are actually quite normal over there, but I can't confirm for sure.