Tooru Honda holds a deep fascination for the tale of the Chinese zodiac passed down by her late mother. A tragic twist of fate leaves her orphaned and homeless, seeking refuge in a tent on the private grounds of the distinguished Souma clan. Encountering Shigure, an elder Souma relative, and Yuki, the school's charismatic 'prince,' Tooru eventually confides in them about her situation. Despite her efforts to conceal her homelessness, the Soumas uncover her secret one fateful night. Moved by her plight, they extend a compassionate offer of shelter, leading Tooru into their enigmatic world. Amidst the warmth of their hospitality, Tooru becomes entwined in the family's hidden truth: each Souma transforms into a zodiac animal upon a hug from the opposite sex. As she navigates this newfound reality, Tooru's life intertwines with the Soumas in a blend of humor, affection, and unforeseen romance.