From the bestselling novel series by renowned author NISIOISIN, comes the manga adaptation of the Monogatari series, with artwork by Oh! great! One day, high-school student Koyomi Araragi catches a girl named Hitagi Senjougahara when she trips and falls. But the girl, much to his surprise, doesn't weigh anything! At all. She says an encounter with a so-called 'crab' took away all her weight… Monsters have been here since the beginning. Always. Everywhere...