'If I Could Do It All Again' depicts mistakes and regrets. The lyrics talk about trying to fix the mistakes and regrets even that has only infinitesimal hopes and extremely low possibilities of miracles. Thus, Yanagi extracted samples from speeches about hope, news about miracles, records about the moments of miracles, and the others. However, he noticed copyright problems, then Yanagi changed to orchestra sounds which is the track of this album.
Yanagi wanted to express natural voice like Liam Gallagher at first. Yanagi tried to sing without any techniques as possible as he can do, but the result was not. Piano, drums, violins, and organ sounds were used for this track. Also, the atmosphere of this song is mainly slowed and chilled like soft rock. In fact, this track was slower but Yanagi changed the tempo and re-recorded the vocals because one of his friends said 'It's too slow'.
The music video was filmed at 12 places of Hakodate, 2 places of Morimachi, and 1 place of Nanaecho in Hokkaido. The music video is about go back to his memories and take photos.