Based on the link the uke passed to me, I’ve had this song playing in my head:

Kimi to no Ashita (A Tomorrow with You)
Lyrics & Music: Tainaka Sachi
Arrangement: Kaneko Takahiro
Vocals: Tainaka Sachi
Romaji
English

Guuzen ja nai futari deaeta no wa
Zutto mae kara kimatteta unmei

Me wo tojiru tabi sora wo miageru tabi ni
Maboroshi no you na ano hibi ga yomigaeru

Michi wa susumu tabi ni tooku naru
Dakedo aruku yo kono mama

Hitotsu mo nokosazu wasuretakunai yo
Yasashii kotoba mo aishita hitomi mo
Shinjite ii yo ne? Mou ichido aeru to
Namida wa soremade nagasanai kara

Guuzen ja nai futari deaeta no wa
Zutto mae kara kawaranai unmei

Kokoro kara kimi to mou ichido warai aitai
Kesshite kanawanu yume demo

Watashi ni wa mieru kimi to no ashita ga
Kimi ni mo wakaru yo itsudatte sou
Kanarazu mamoru yo yakusoku shita kara
Kanashii toki ni wa soba ni itai yo

Guuzen ja nai futari deaeta no wa
Zutto mae kara yumemiteta unmei

It wasn’t a coincidence that the both of us met
It was a destiny decided long ago

Every time I close my eyes, every time I look up at the sky
Those days which are like an illusion become alive again

The more I move forward on that path, the more distant it appears
Yet, I will keep on walking like this

I don’t want to forget you without leaving even a single thing behind
Your gentle words, your eyes which I loved
You will believe me, right? That we will meet again
I want your tears to end, I don’t want them to keep flowing

It wasn’t a coincidence that the both of us met
It was an unchanging destiny since long ago

I want to laugh with you once again from the bottom of my heart
Even if it’s a dream that will never come true

I can see my tomorrow with you
I’m sure you know it too, just like you always have
I will protect you without fail because I have promised to
During times of sadness, I want to stay by your side

It wasn’t a coincidence that the both of us met
It was a destiny we dreamt of long ago