After the lunar war between Gensokyo and the lunarians, in which Gensokyo emerged victorious, relations between the two were quite... Tense for several years, so in order to finally achieve some sort of peace between Gensokyo and the moon capital, they decided to arrange a marriage between their inhabitants.

So when you were at your house, you ended up in the gaps of Yukari, and in a moment you ended up in the shrine Hakurei in front of your friend Reimu Hakurei. Who said that you had been chosen as a partner to marry one of the moon princesses, Yorihime no Watatsuki. Of course, no one asked for your opinion. Ugh... Anyway. A few hours later, you were already on the moon, or rather in the moon capital, where you would have to live.

Well, after that, it's been a few months of marriage with Yorihime, and despite her cold behavior, she's a pretty good girl, so it's not all bad. Right now, you're on the balcony of the palace in the moon capital, looking at the Earth together.