Books with title Someday

Sociable, outgoing and unpredictable. That was Cai Basson. Kimberly Weaver? Not so much. But when Kim is forced to interact with Cai (not because her best friend is his twin) her world undergoes a drastic change. Things get wilder when her friends decide to start an end-of-the-year bucket list. However, while Kim gets used to the shift in her everyday life she is unaware how suddenly it could all shatter on account of precisely one person.