Four, three, two, one
How deep is your heart?
Deep inside the darkness daremo shiranai tokubetsu na
Want to feel...

Sono yami ni furetakute sotto te o [bad word] kimi ni
kizukarenai you ni... nodo bakari kawaita

Reached out to your heart
So deep yawarakaku tsutsumareta sono kokoro motto [bad word] [bad word] ah

How deep is your heart?
Deep inside the darkness daremo shiranai tokubetsu na
Want to feel...

How deep is this love?
Deep inside your heart yasashiku kowarenai you ni
Want to touch...

Sou dare demo himitsu wa [bad word] I even have so many secrets... maybe more than you
kokoro [bad word] [bad word] I wanna know your little secret that you have deep in you

Reached out in the dark
So warm zaratsuita ase ga kokoro no hida o amaku nurasu ah

How deep is your heart?
Deep inside the darkness daremo shiranai tokubetsu na
Want to feel...

How deep is this love?
Deep inside your heart yasashiku kowarenai you ni
Want to touch...

How deep is your heart?
Deep inside the darkness... Somewhere unknown and special
Do you want to feel...?
Do you want to feel...?

Translation:

How deep is your heart?
Deep inside the darkness
No one knows, it's special
Want to feel...

I want to feel in the darkness
I held my hand out to you
without letting you notice...
My throat was dry

Reached out to your heart
So deep I was gently wrapped up in you
I want to know your heart more deeply ah

How deep is your heart?
Deep inside the darkness
No one knows, it's special
Want to feel...

How deep is this love?
Deep inside your heart
Gently, to keep from breaking you
Want to touch...

Yes, everyone has secrets
I even have so many secrets...maybe more than you
Hidden deep in your heart
I wanna know your litte secret that you have deep in you

Reached out in the dark
So warm the rough sweat sweetly wets
the folds of your heart ah

How deep is your heart?
Deep in side the darkness
No one knows, it's special
Want ot feel...

How deep is this love?
Deep inside your heart
Gently, without breaking you
Want to touch...

How deep is your heart?
Deep inside the darkness...
Somewhere unknown and special
Do you want to feel...?
Do you want to feel...?