影子走路的背景音乐叫 《불면증 （失眠症）》， 由휘성 （辉星）演唱，其歌词如下：
You know that I love you
Sweet
Can't you see my eyes
There's only one, the real slow
Love
Love
Love
Love
Feels like insomnia ah ah
Feels like insomnia ah ah
Feels like insomnia ah ah
Feels like insomnia ah ah
가는 길
Love
Love
Love
Love
But
But
But
But
Feels like insomnia ah ah
Feels like insomnia ah ah
Feels like insomnia ah ah
Feels like insomnia ah ah
Ah 불타는 이 사랑
Feels like insomnia ah ah
Feels like insomnia ah ah
Feels like insomnia ah ah
Feels like insomnia ah ah
Feels like insomnia ah ah
Feels like insomnia ah ah
Feels like insomnia ah ah
这首歌的歌词大意是：
你知道我爱你
甜蜜
难道你看不见我的眼睛
只有一个，真正的慢
爱
爱
爱
爱
感觉像失眠一样 ah ah
感觉像失眠一样 ah ah
感觉像失眠一样 ah ah
感觉像失眠一样 ah ah
我走的那条路
爱
爱
爱
爱
但是
但是
但是
但是
感觉像失眠一样 ah ah
感觉像失眠一样 ah ah
感觉像失眠一样 ah ah
感觉像失眠一样 ah ah
啊，燃烧的这份爱
感觉像失眠一样 ah ah
感觉像失眠一样 ah ah
感觉像失眠一样 ah ah
感觉像失眠一样 ah ah
感觉像失眠一样 ah ah
感觉像失眠一样 ah ah
感觉像失眠一样 ah ah