The quotations from "Convex and Concave World" include:

1. You say that the sea is the most beautiful blue, because you have never seen his eyes.

2. There is a color in your eyes that others don’t understand, attracting a group of confused and ignorant people.

3. I am willing to bear all the sins for you, and there will be arrows of darkness to protect you forever.

4. How can the coldness of the surface compare to the heat of your heart? After all, the sharp blade in your hand only cuts what you hate and protects what you love.

5. The unknown tenderness in the sandalwood-purple eyes is covered by ice and snow. I just want to be a little warm to melt the ice and snow.