I must say this is a rather long CYOA considering it's just "pick one out of 2". And I think it's the only one waifu-picker I've seen with only two choices.
BTW, shapeshifting or not, I can't help but notice their chest sizes seem to range between small and flat…
>you become a demigod and Defender of Earth
According to the flavour text this is very important… Except it's not elaborated, at all. The only thing I get (in passing, too) is that demigods can visit pocket dimensions and are resistant to heat ("a perk of being a Demigod is having many abilities, none of which I'll tell you about"). I'm guessing it also implies immortality but I don't believe it's ever mentioned.
>while your presence and actions may be known to humans, it must be kept secret
Uh… Huh?.. Which is it then?
>mountains near the North Pole
What mountains?! It's in the middle of an ocean!
>agrarian lifestyle
I'm intrigued. What can you grow on top of ice? Then again, building a castle on top of it is likely even more challenging… But even if there was ground, what crops grow in sub-zero temperatures?
>they were born around XV century
>they got bored more than a decade ago
They kept doing their stuff for five centuries but only got fed up with it now? (And saying they were admiring humans doesn't sound very humble BTW.) Not to mention that it took more than ten years for their mother to start listening…
Also, why did you put "general backstory" flavour text in the middle of a choice section?
>bring your friend in three days and pick one of the waifus
Suppose I don't have friends (or at least unmarried ones), what then? Do I have to find a decent unmarried stranger and convince him to marry a heathen goddess and to abandon his mortal life, all within that timeframe?
…Come to think of it, would someone willing to leave his mortal life in three days' time actually have any friends to choose from?