Volume 1 is the first volume of Fruits Basket.
Tohru Honda is a simple, sweet-natured girl who, despite her happy-go-lucky disposition, never did have much luck on her side. Her mother, Kyoko Honda died in a car accident so Tohru went to live with her grandfather. Her grandfather was getting renovations on his house, so they had to both leave the house for 4 months. Her grandfather went to live with some of his family and Tohru didn't want to be a burden on her friends. She then decided to live on her own in a tent! She went on a walk and found a house with small zodiac ornaments.
Her fortune is about to change, however, when her classmate Yuki Sohma offers to put her up to his residence, after Tohru's makeshift home is washed away in a storm. There, she unwittingly stumbles upon his family's deep dark secret, and a series of madcap and heartwarming antics ensue as the lives of the once private Sohmas are turned upside down with the arrival of the new addition to their family! It's time for the party to begin, and everyone's invited!