This is a love story.
My choices change the princess, what I think she can be she is, which is important to me in a personal way. There's a lot of dialogue on the unwillingness of the player to make choices, I mostly tried not to hurt her, but this results in either waiting until you reach an ending with the current princess you have, or her hurting (killing) you.
And so it begins again, until eventually you reach her divine form, some of the dialogue between the player and the princess is 1:1 things I've said to my girlfriend, which is when it mostly clicked that it was a game about love.
You change the princess, she changes you.