​When an earthquake destroys Kotoko’s new house, her father’s childhood friend invites them to move in. To Kotoko's shock, the friend's eldest son is Naoki Irie—the school's most perfect, arrogant genius who just publicly rejected her love letter. Forced to live under the same roof, Kotoko’s chaotic warmth begins to disrupt Naoki’s perfectly calculated, boring life, turning his cold indifference into something unforgettable.