This was the song they used to announce their engagement as they filmed it in three countries, and he proposed on camera in the final but in the others she was engaged to him already.

Lena, Jaehyun, Both, Both with Chorus group

I have a question
It might seem strange
How are your lungs?
Are they in pain?

'Cause mine are aching
Think I know why
I kinda like it, though
You wanna try?

Oh, would you be
So kind
As to fall in love with me, you see
I'm trying
I know you know that I like you
But that's not enough
So if you will
Please fall in love
I think it's only fair
There's gotta be some butterflies somewhere, wanna share?
'Cause I like you
But that's not enough
So if you will
Please fall in love with me

Let's write a story
Be in my book
You've got to join me on my page
At least take a look

Oh, where are your manners?
You need some time?
Let's swap chests today
That might help you decide

Oh, would you be
So kind
As to fall in love with me, you see
I'm trying
I know you know that I like you
But that's not enough
So if you will
Please fall in love
I think it's only fair
There's gotta be some butterflies somewhere, wanna share?
'Cause I like you
But that's not enough
So if you will
Please fall in love with me

Oh, do me a favour
Can your heart rate rise a little?
Do me a favour
Can your heart rate rise a little?

Oh, would you be
So kind
As to fall in love with me, you see
I'm trying
I know you know that I like you
But that's not enough
So if you will
Please fall in love
I think it's only fair
There's gotta be some butterflies somewhere, wanna share?
'Cause I like you
But that's not enough
So if you will
Please fall in love
Oh, I like you
But that's not enough
So if you will
Please fall in love with me

MUSIC VIDEO:

0:00-1:00= Lena and Jaehyun are in New York as they film the first part of the video, and they are shown as they are in the middle of a park as they slowly come together and they dance during the chorus.

1:00-1:59= Lena and Jaehyun are now in Rome, Italy as they film the second part of the video and they are dancing on the streets are people are shown staring at them.

1:59-3:01= Lena and Jaehyun are dancing, as they are in Paris, France, before Jaehyun spins Lena before he is down on one knee as he sings the start of the final chorus. Before Lena runs to him as she kisses him slowly. And when it is the higher note in the chorus Jaehyun lifts Lena as they dance and people are cheering.