Survive, whatever it takes
-- Natsuki (Chapter 1)

Importance: Natsuki and Yuu pledge to marry one another, and they write down their promises to one another, which include not holding hands with anyone else and wearing their rings when they sleep. Their third promise is Yuu's sole contribution to the contract. This quote is important because it highlights the role of survival in an abusive childhood.

I was immersed in my love for Yuu and my magical powers. As long as I was here in this space, I was safe and nobody could destroy our happiness.
-- Natsuki (Chapter 1)

Importance: Natsuki is an imaginative and lonely girl. This quote is important because it shows how desperately she clings to her connection with Yuu, who is the only person who she feels love toward and from.

My town is a factory for the production of human babies. People live in nests packed closely together. It’s just like the silkworm...
-- Natsuki (Chapter 2)