《Cruel Moon》是arca演唱的歌曲，由五十岚填词，五十岚谱曲。

经典动画《无颜之月》的主题曲，我是在看了《无颜之月》后喜欢上了这首曲子，《无颜之月》几乎成了成人动画中的经典之作，里面那首略带丝丝哀伤的主题曲《Cruel Moon》，因其优美的曲调也赢得了很多人的喜爱。大概这首美妙的曲子也是成就这部《无颜之月》的关键要素吧。人们经常说一首或一组好的音乐作品，是一部电影最为击中人心的部分之一，个人感觉，《Cruel moon》正是一首典型的音乐佳作。我是在看完这部动漫之后，瞬间被它的这首主题曲迷住，然后再细细品味其中的剧情，才对这部剧印象深刻的，我个人认为，这部剧之所以能成为经典之作，这首歌曲有莫大之功。

We used to walk all through the night

Looking for something we could never find

Now I alone sit in the deep

And talk to ghosts I can' t see

I hear the wind call my name

Oh, where can I find a trace

Cruel Moon, I cry for you

To bring him back to my place

I used to feel magic in the night

Gazing at your eyes to find there the light

Now left alone out in the cold

Hearing the goodbye you told

I hear the wind call my name

Oh, where can I find a trace

Cruel Moon, I cry for you

To bring him back to my place

I hear the wind call my name

Oh, where can I find a trace

Cruel Moon, I cry for you

To bring him back to my place