Despite the kaleidoscopic magic ingrained in everyday life, Hitomi Tsukishiro's monochrome world is deprived of emotion and feeling. On a night as black and white as any other, amidst the fireworks spreading across the sky, Hitomi's grandmother Kohaku conjures a spell, for which she has been harnessing the moon's light for 60 years, to send Hitomi back in time to the year 2018 when Kohaku was in high school. Hitomi's mission seems unclear, but her grandmother assures her that she will know when she gets there. Following a trip through time aboard a train driven by a strange yellow creature, Hitomi finds herself in stoic artist Yuito Aoi's room, and his drawings flood her world with color. What is Hitomi's purpose there, and why do Yuito's drawings return such breathtaking color to her drab world? Set in the city of Nagasaki, the story takes place in a world where a miniscule amount of magic remains in everyday life. Hitomi Tsukishiro is a 17-year-old descendant of a witch family who grew up with stale emotions, as she lost her sense of color at a very young age. Feeling sorry for her granddaughter's future, Kohaku, a great witch, sends Hitomi to past, the year 2018. Through exchanges with her 17-year-old grandmother and her club members, the story follows Hitomi's growth as a person.