In the Federal Kindgom of Gensokyo, Queen Marisa was the sole legal wife of King Kourin. But how was he able to establish more than one royal bloodline under his own blood? Have you ever thought about trying to be married to more than one person at a time? No! It’s impossible; you can’t be married to more than one spouse at a time because marital law won’t let you. It is still permissible, given that you divorce the first one.

That said, how was King Kourin still able to maintain his marriage to Queen Marisa while fathering two more kids under different mothers? The answer – the Treaty of Kozankyo. Under the treaty, King Kourin was allowed to be the consort or, in other words, “partner” of the ruling monarchs of the People’s Kingdom of Gensokyo and the Democratic Kingdom of Gensokyo, each headed by Empress Kaguya and Queen Yukari respectively, while still remaining the husband of Queen Marisa of the Federal Kingdom of Gensokyo.

The official text of the treaty goes as follows:

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Treaty of Kozankyo

An Act to give the People’s Kingdom of Gensokyo and Democratic Kingdom of Gensokyo a partner they could make their consort, but not their spouse.

With the defeat of Vladrouge Scarlet and the establishment of the Federal Kingdom of Gensokyo in the years 1701 and 1702, respectively, King Kourin has been named the consort of Her Majesty the Queen Marisa, the monarch of the Federal Kingdom of Gensokyo. King Kourin is considered a symbol of the free kingdom that Queen Marisa established this year and is responsible for uniting the people by a common allegiance to the Queen. This also includes all members in established constitutional positions, as well as any future heirs and successors of the Queen.

Under this Act, King Kourin has an act of expanding his influence to the neighboring kingdoms on the Gensokyo Continent, namely the People’s Kingdom of Gensokyo and the Democratic Kingdom of Gensokyo. Therefore, it will be enacted if the two kingdoms agree to this treaty, and with the consent of the Queen and the Parliament of the Federal Kingdom of Gensokyo, as follows:

1. Meaning of This Treaty
   • The involved parties in this treaty include the Federal Kingdom of Gensokyo, the People’s Kingdom of Gensokyo, and the Democratic Kingdom of Gensokyo. Only this treaty can be enacted if the monarchs of those three kingdoms, as well as its legislatures, agree to this treaty.
2. Validity of the Laws Made in this Treaty
   • While King Kourin shall retain his marriage with the Queen, Sections 1325 and 1546 (namely the Marriage Act of 1702) of the Criminal Code shall not apply, allowing King Kourin to have children with the monarchs of the People’s Kingdom of Gensokyo and Democratic Kingdom of Gensokyo, respectively.
3. Power of King Kourin in the People’s Kingdom and Democratic Kingdom of Gensokyo’s Legislation
   • It is hereby declared that King Kourin have full power to enact or veto laws in the two kingdoms mentioned, while still maintaining full power in the Federal Kingdom of Gensokyo.
4. Legislatures of the People’s Kingdom and Democratic Kingdom of Gensokyo to not Legislate in the Federal Kingdom of Gensokyo
   • Any act of legislature enacted by the two kingdoms shall apply in the respective kingdom and shall not extend to the Federal Kingdom of Gensokyo in any form.
5. Powers of the People’s Kingdom and Democratic Kingdom of Gensokyo in Relation to Merchant Shipping
   • Without prejudice to the generality of the following provisions of the Act, the two kingdoms shall have the full right to export goods between the kingdoms.
6. Admission to the Federal Kingdom of Gensokyo
   • In the event that any of the two kingdoms decides to join the Federal Kingdom of Gensokyo as a province, they may only do so if both the House of Representatives and Senate pend a two-thirds majority vote and if the Queen signs any act into law.
7. Meaning of Kingdom in Future Acts
   • Not withstanding this Act, no kingdom that is a member of the Federal Kingdom of Gensokyo shall be accepted into this Act, and neither shall any provincial government in any of the kingdoms involved be accepted into this Act. Future kingdoms that are independent may enroll into this Act if the legislatures of the independent kingdom and Parliament consent to amend this Act to include the independent kingdom, unless it joins as a province of the Federal Kingdom of Gensokyo.