So I recently listen to this song. Well Idk if its in Korean or Jap. But I like the music alot and the lyrics in English is very meaningful. So yeah, here is the lyrics.

To like and dislike

It is not something that can be conveyed easily with words

Once a year, on this special day

Time and time again, forever closest to you

Your innocent smile and your unchanged gesture

Each and every one of them is my treasure

For you to lead your life smiling,

Just that alone

Make me so happy, warm and feel that I could be gentle

You make my future seem so bright

Wrapped up in your love that is so big, it gave me the warmth whenever I walk

My heart is filled with lots of friends' gentleness

We messed up and fought

But we learn the happiness of understanding each other

The uncountable memories

From this day on, let's create more of them

If we were to be born in this world again someday

We would meet again like this someday

And I will love you again like this

There are barriers we have to overcome

But no matter what happens

I'll be right next to you

If my wish could come true

Would someone please cast magic on you so that

No tears of sadness would ever have to fall down your face

I'll be living with you

With a beautiful smile and my head held high

Such a future awaits us

Thank you for today

(lyrics not 100% correct)

So yeah, this song has nice lyrics, music and also has a meaning behind. So I will remember this song by heart.

And yup, this is Eternal by Jin Akanishi.