For their sixteenth birthday, Aya and Aki Mikage, twin brother and sister, receive a single gift presented to the two of them that changes their lives forever. Aya learns that she is the reincarnation of the celestial maiden Ceres, and her family takes her brother away from her before they try to kill her! Aya's future now depends on uncovering the past, as learning what ties Ceres has to the Mikage family might be the only way to save her life, and...

Tohru Honda thought her life was headed for misfortune when a family tragedy left her living in a tent. When her small home is discovered by the mysterious Soma clan, she suddenly finds herself living with Yuki, Kyo, and Shigure Soma. But she quickly learns their family has a bizarre secret of their own: when hugged by the opposite sex, they turn into the animals of the Zodiac!