This song is dedicated to everyone's first love. This song is dedicated to everyone's first love. I only smile at you once. So that I won't forget the past. You don't know what's more important than what you've done. I only smile at you once. So that I won't forget the past. You don't know what's more important than what you've done. I close my eyes and see you again. I only smile at you once. So that I won't forget the past. I only smile at you once. So that I won't forget the past. I only smile at you once. So that I won't forget the past. You don't know what's more important than what you've done. I only smile at you once. So that I won't forget the past. I only smile at you once. So that I won't forget the past. I only smile at you once. So that I won't forget the past. I only smile at you once. So that I won't forget the past. I only smile at you once. I only smile at you once. So that I won't forget the past. I only smile at you once. So that I won't forget the past. I only smile at you once. So that I won't forget the past. I only smile at you once. So that I won't forget the past. I only smile at you once. So that I won't forget the past. I only smile at you once. So that I won't forget the past. I only smile at you once. I only smile at you once.