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My sister Miyu (Inaba) and my sister Kana (Nagisa) who leave their parents and live in harmony with their sisters. Neighbor Sato, who looks at them with a nasty look, calls out to Kana one morning, aiming for her alone. "I have something I want to show," he said, and Sato replied Kana, who forcibly brought her disliked Kana home. However, that alone was not enough, and Sato's desire was also directed to Miyu.