Daiki Kurosu is an ordinary high school student. He worries about his test results and deals with his cute but overbearing little sister, but he's not entirely dissatisfied with his peaceful everyday life. However, Daiki feels a sense of discomfort with such a routine life. One day, he meets a girl on a street corner who appears with a sudden intense palpitation. She is a witch living in the present world...! (Source: Kadokawa, translated)