The story takes place in the future world, when humans can already use a small amount of magic in daily life. Yuebai Hitomi (voiced by Ishihara Natsuori) is a descendant of the demon clan with the blood of a magician. Although she can use magic, Yuebai has always avoided it in her life. Yuebai has suffered from color vision disorder since childhood and cannot see colors. Living in a black and white world, her personality is also very depressed and indifferent. Her grandmother is very worried about Yuebai's future, so she casts a spell to send her back to Nagasaki in 2018. In Nagasaki 60 years ago, Yuebai met her grandmother Amber (voiced by Hondo Kaede), who was still a high school student. What surprised Yuebai was that the world in front of her eyes became colorful. Aoi Yuito (voiced by Chiba Shoya), who is keen on painting, the gentle Yamabuki Masaru (voiced by Maeda Seiji), and the cheerful and optimistic Kawai Kurumi (voiced by Toyama Nao), Yuebai quickly made friends here.