Knock, knock, knock 今は 誰の笑顔を待ち焦がれて ドアを開けるの？Lock, lock, lock 君の笑顔 とっくに忘れていた はずだったのに
「さよなら」なんて言葉だけこの心には 刻んである You and I
Knock, knock, knock 今は 僕の笑顔を待ち望んでいる 恋人がいるLuck, luck, luck 過去を忘れるほどにLove, love, love 恋に落ちているけど
戻れるなら 今すぐに君の元へと 走って行くから
僕の First Love忘れられない忘れたくても ずっと君が蘇る僕の First Love
君が First Love今も ずっとYou are my first love永遠に 僕の First LoveMy first love
Knock, knock, knock Now missing whom,Do you open the door?Lock, lock, lock I forgot your smile long agoSo I supposed
"Good bye" is the only wordThat is inscribed in my heart You and I
Knock, knock, knock Now my smile isMissed by my loved oneLuck, luck, luck As much as I forget my pastLove, love, love I'm in love though
If I can go back, right nowI'd run to you
My first loveI can't forgetEven if I want to forgetYou keep coming back to my mindMy first love
You are my first loveEven now until nowYou are my first loveMy first love foreverMy first love