Hitomi Tsukishiro lives in a world devoid of color, both literally and emotionally. Her grandmother, Kohaku, uses a powerful spell to send Hitomi 60 years into the past, to 2018, when Kohaku was a high school student.
Hitomi arrives in the room of Yuito Aoi, a quiet and artistic boy. His drawings possess a unique quality that restores color to Hitomi's monochromatic world.
The anime follows Hitomi's journey as she tries to understand why her grandmother sent her to the past and the significance of Yuito's artwork in revitalizing her senses and emotions. She must navigate this new environment and discover her purpose without knowing exactly what she's meant to accomplish.