It's (translation)

I swear now, by those days that will never return, I'll overcome this sorrow
On this journey to meet you again, I won't emerge unscathed
Even my footprints are burning themselves out

You once told me that the future can't be stolen away, and just knowing that,
I can go on, the pounding of my heart driving me forward

Just go on

If you're smiling, if you can sing,
that becomes everything I've ever wanted (wow wow)
The courage you gave me, the kindness you showed me...
These become the power I need to walk forward, fixing my eyes straight ahead

If an overpowering shadow falls on us, it's because beyond that, there's an overpowering light
You can still run, you can still stand,
and you'll regain the pieces of yourself you'd begun to lose

That day, your smile changed me, opening my locked heart,
and if I hold just that one thought tightly in my heart, I can overcome any hardship

Ready to fight

If your head is bowed, if you're unable to move forward,
then protecting you becomes everything to me (wow wow)
With the heart you gave me and the strength born from loving someone,
I'll step into the darkness and change it into a brilliant light

The future can't be stolen away, and just knowing that, I can go on

Just go on

If you're smiling, if you can sing,
that becomes everything I've ever wanted (wow wow)
The courage you gave me, the kindness you showed me...
I'll fix my eyes straight ahead

Ready to fight

If your head is bowed, if you're unable to move forward,
then protecting you becomes everything to me (wow wow)
With the heart you gave me and the strength born from loving someone,
I'll step into the darkness and change it into a brilliant light