What do you think of After School's latest song? 

The music video:

One of the live performances:

The lyrics translation: 
Na na na na na na na
Na na na na na na na
Na na na na na na na na

I was so young back then, I could only see you
I didn’t need anything if we could be together

We fought a lot about things that weren’t a big deal
When I think about it, only laughter comes out

Sometimes I’m so curious about you, I could die
But there’s nothing I can do about it now

Sometimes I think of you and I miss you so much
But I will just bury it in as beautiful memories

First love, my unforgettable love
Why does it hurt so much? Am I the only one who remembers?
First love, I call out to you with this desperate voice
Until it can reach you, until always

Na na na na na na na
Na na na na na na na
Na na na na na na na na

Hello? Just saying that one word is hard so I can’t even call you
I’m sorry that I didn’t treat you better, I’m so sad over you
I can’t be held by you anymore, even in my dreams
Don’t ever hurt again and be happy, I will pray for you

The past memories flicker before me, I can’t do anything
Why am I such a fool?

First love, my unforgettable love
Why does it hurt so much? Am I the only one who remembers?
First love, I call out to you with this desperate voice
Until it can reach you, until always

I close my eyes in this moment, tears flow in this moment
Why am I so pathetic, still not over you?
Without a choice, I’ll pray for your happiness

Na na na na na na na
Na na na na na na na
Na na na na na na na na