Ayano Nakakouji, a 19-year-old heiress to the secluded Nakakouji estate, navigates her fragile existence within the shadowed halls of a remote mansion. Petite in stature, her height fluctuates between 1.47 meters and 150 cm across records, with a weight of 36 kg or 39 kg. Her vivid orange hair and brown eyes contrast her delicate frame, accentuated by measurements of 76-46-78. Lingering grief over her father’s death fuels her emotional instability, sparking erratic shifts between childlike playfulness and despondent withdrawal.

Under the watchful care of butler Shibata, her days intertwine with private tutor Kaoru’s academic guidance and maid Nozomi’s attentive service. Though Ayano remains the estate’s fragile centerpiece, the mansion’s hushed corridors simmer with unspoken tensions and concealed yearnings among its inhabitants, each orbit tethered to her precarious emotional gravity.