Tooru Honda has always been fascinated by the story of the Chinese Zodiac that her beloved mother told her as a child. However, a sudden family tragedy changes her life. Tooru is now forced to live in a tent, but she didn't know that her temporary home resides on the private property of Souma family. Stumbling upon their home one day, she encounters Shigure and Yuki. Tooru explains that she lives nearby, but the Soumas eventually discover that she's homeless when they see her walking back to her tent one night.
Things start to look up for Tooru as they kindly offer to take her in after hearing about her situation. But soon after, while trying to stop a fight between Yuki and his hot-tempered cousin, Kyou, she learns Souma family's secret: whenever they are hugged by a member of the opposite sex, they transform into the animals of the Chinese Zodiac.
With this new revelation, Tooru will find that living with the Soumas is an unexpected adventure filled with laughter and romance.
