It is not wrong to say that the book has received a good rating in Japan. As the name of the film suggests, Tomoyoshino, her only childhood friend, stands by Mariko's side, full of abandonment and abuse. Mariko and Shino's bond is quite deep. One day, when Shino heard the news of Mariko's death, he was shocked. Feeling unable to help his best friend out of the darkness, Shino became determined to free Mariko's ashes for one last journey...