Sumeragi Rinka is a tall, strikingly beautiful girl with long black hair and piercing crimson eyes, known throughout the school as the cold and untouchable "Ice Queen" who mercilessly rejects every male confession—earning her the fearsome nickname "Ace of Downfall." Yet beneath this intimidating facade lies a deeply sensitive, affection-starved girl who has endured the grief of losing her mother and the neglect of her father, a hidden tenderness she conceals behind barbs of sarcasm and mock-pride.