I was positive there was an English version of this on YouTube, but I can't find it now. There is a subtitled version, but it shows clips from the series, and I'm afraid that might be a little off-putting to some here.
Anyway, I think it's a beautiful song no matter what language it's in.
The English translation I shamelessly stole from another YouTube post:
Tatta Hitotsu No Omoi
Within the difficulty of accomplishing my one and only wish, I
Want to show you that I'll protect you to the end, for something irreplaceable, it's a promise that I want to fulfill
Within the world covered in doubts, I still haven't found the answer
Nevertheless, I advance forward- Why?
Cypress trees stretch into the sky; the road pointed straightforward
Let's believe in the miracle called 'now'
A dreamlike reality- If it's something that I can change with my hands
Within the difficulty of accomplishing my one and only wish, I
Want to show you that I'll protect you to the end, for something irreplaceable
I vow to my pounding heartbeats, I'll keep on running until I burn up
Within the eternal love, which I can feel it indeed surviving, it's a promise that I want to fulfill
Sunflowers bloom at the foot of the hill; the dazzling and spreading yellowness
Shines the light of hope
When it comes to things that I can change
There should be a varied way of living
Let's risk everything; I want to be shining within my granted time
I'm just only breathing and being here; even though it's just that, my feelings overflow
I have my happiness; just by being able to think so, how much
Light, enough to be lovely, will this moment release?
It's a distance far too long to advance on alone
Won't someone open this door? I'm waiting
Within the difficulty of accomplishing my one and only wish, I
Want to show you that I'll protect you to the end, for something irreplaceable
I vow to my pounding heartbeats, I'll keep on running until I burn up
Within the eternal love, which I can feel it indeed surviving
It's a promise that I want to fulfill....
