When Ame Aihara (Mei Nagano) was a high school student in Nagasaki, she wasn't confident in herself due to her past. Taiyo Asano (Yuki Yamada) was a student attending the same school as Ame Aihara. He was the only person who talked to her brightly. With him, she was able to see her life positively for the first time in her life. She had feelings for him. After her graduation, she went to Tokyo to fulfill her dream of becoming a patissier without telling Taiyo Asano about her feelings for him. After 8 years, she returns to Nagasaki. One day, she meets Taiyo Asano whom she has never forgotten, and is elated to see him again. An accident occurs soon occurs and Ame Aihara falls into deep despair. A man appears in front of her and introduces himself as a guide from the afterlife. He tells her that if she gives her heart to him, he will make a miracle for her. Meanwhile, Taiyo Asano is a bright person. His family has operated a fireworks shop for generations in Nagasaki. His dream is to become a fireworks expert and succeed his father in their family business. Even though he is a bright and honest person, he didn't tell Ame Aihara about his feelings for her when they were together. He meets Ame Aihara, whom he has never forgotten, again for the first time in 8 years.