Amanatsu & Amanatsu Cake

I saw my neighbor when I was walking this morning. He gave me a big orange called "amanatsu" from his back yard. The orange size was the same as both of my fists.
I baked a cake using it. I used the juice from half of the orange in the cake batter. While the cake was baking in the oven, I made syrup from the other half of the orange. I soaked the cake in the syrup after I baked it. The orange's sourness was good for the cake.