A Case Of You is out of the once-placed Karjera (Key of Luck) and is her fifth foal and third winner. Karjera has had six foals in all, and besides A Case Of You they include the winners Loose Chippings (Rock of Gibraltar) and Knight of Luck (Mukhadram).

The second dam is Lock's Heath (Topsider), a dual winner, dam of Karjera's full siblings Akanti, a multiple stakes winner with two Listed wins, and Lock And Key, who was placed in Group 3 and Grade 3 company in Ireland and America. She is a half-sister to the Listed winner Big Brown Bear (Strike The Gold) and to the juvenile winner Dream Regally (Vice Regent), dam of the Listed winner Lacie Girl and grandam of the Listed winner Lacie Slew.

The third dam is Lock's Dream (Youth), a Listed winner.

Fourth dam Trillionaire (Vaguely Noble) won the Gr.3 Princess Royal Stakes and is also the dam of the sire Not In Doubt (Tom Rolfe), third in the Gr.3 Henry II Stakes. This is also the family of Summer Wind Dancer (Siberian Dancer), a Gr.2 winner and Gr.1-placed.

Karjera's latest foal is Ali Babes, a filly by Alhebayeb. She visited River Boyne in 2021.