In 2030, a ravaging storm strikes Tokyo, 17-year-old Hiroki Kurogane seeks for a shelter in an abandoned bookstore, tormented by memories of a world destroyed by cruelty and greed. When a mysterious, ancient glowing book catches his attention, As things got worse, Hiroki realized he was facing certain death, and an unknown force pulls him into a destiny he never expected. Hiroki will suffer to unravel the mystery of the book, confront his fractured past, and to uncover the truth about Yumix.