Tooru Honda had long been captivated by the tale of the Chinese zodiac that her dear mother recounted to her as a child. Yet an abrupt family calamity upended her world, leaving her utterly alone. She is now compelled to shelter in a canvas tent, unaware that this makeshift dwelling sits on the private grounds of the Souma clan. One day, while wandering near their estate, she meets Shigure, an elder cousin of the Soumas, and Yuki, the self‑styled "prince" of her high school. Tooru tells them she lives nearby, but the Soumas eventually uncover her quiet truth of homelessness when they spot her returning to her tent under cover of night.
Things begin to improve as the Soumas graciously offer her a place after learning her plight. However, shortly thereafter she becomes embroiled in a clash between Yuki and his fiery cousin Kyou. In her attempt to intervene, she discovers that the Souma family guards a hidden secret: whenever an opposite‑gender member embraces them, they morph into the creatures of the Chinese zodiac.
With this newfound knowledge, Tooru realizes that cohabiting with the Soumas will turn into an unforeseen journey brimming with humor and affection. Their bond grows stronger with every day. Love blossoms amid the zodiac's mystique.
