From a certain day, Matsuura Eyu felt pain even though she was not injured, until one day she saw the red-haired boy being besieged in the alley and suddenly understood what beauty is misleading.
From a certain day on, Kamui was obviously injured but didn't feel any pain at all. Until one day, when he saw the black-haired girl who tripped over a stone, Kamui felt that his vision went dark.
The story of Kamui being tortured by his aunt.