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Hinata Shiraishi, an ordinary high school girl, undergoes a heart transplant that occasionally causes her to take on the personality of the heart’s previous owner, a skilled detective named Haida. When triggered, Hinata transforms into a sharp-minded investigator, solving complex cases. She partners with Krow, a laid-back and flirtatious detective who lacks seriousness but aids her in investigations. Together, they tackle a series of violent crimes in their city, with Hinata navigating her dual personas. Their partnership begins to uncover connections between seemingly unrelated cases, setting the stage for deeper mysteries.
