Lyrics:

Himawari no narubu sakamichi
Kyou wa otagai gyaku ni aruiteku
Kodomotachi no koe no sukima ni
Anata o semeta jibun ga kanashii
Tamerai mo naku hajimatta koi
Natsu ga owareba betsubetsu ni ikiteku

Sayonara wa mou iranai
Fuyu wo matenai kara futaridake no CHRISTMAS EVE
Atsui hizashi ga ILLUMINATION
Kurushii ai ni kawattemo ii, dakishimete

Nemurazu kattata umibe de
Hareta me otagai yubsashi waratta
Futari no asa wo mukaeru tabi ni
Hitori no heya ga kowaku natteta

Sayonara wa mou iranai
Yakusoku no EVE wo koko de ima kanaete
Tameiki no KISS wa CELEBRATION
Egao no naka no itami no imi wo dakishimete

Zutto kono mama de itaiyo
Ienai kimochi kowarenu youni dakishimete

Manatsu no EVE wasurenai
Anata no koto wasurenai
Futari no EVE wasurenai
Anata no koto wasurenai

Translation:

On a hill lined with sunflowers,
Today we walked backwards together,
In the mist of the children's voices,
I'd sad for reproaching you
With the slightest hesitaion, our love began
But when summer ends, we'll lead our seperate lives.

We no longer need goodbyes
Because we can't wait for winter,
This is our own Christmas Eve, just the two of us.
The warm sunlight is illumination
It's alright if our love becomes painful,  hold me tight

Sleepless night talking by the seashore,
We both pointed at each's swollen eyes and laughed
Every time we're together until the morning comes,
A room for one has become scary

We no longer need goodbyes
Please grant my promised Christmas Eve, here and now.
A kiss with a sigh is our celebration
Hold onto the meaning of pain with our smile

I want to stay like this forever
Hold onto the feelings we can't express, so that they don't end

I won't forget our midsummer's Eve.
I won't forget you.
I won't forget the Eve that the two of us spent together.
I won't forget you.