Makoto and Makoto are beautiful pianist sisters who are famous in the neighborhood. They practice piano at home every day, hoping to follow in their older sister's footsteps. A middle-aged, reclusive, NEET man living next door feels persistent anger at the sound of the piano, and finally storms into the house where the sisters live. One day, the younger sister is taken to the man's house and raped. The evil hand gradually reaches out to the older sister.