When I Received a Terminal Diagnosis, My Fiancé's Attitude Was Terrible

I, Elina Atwale, despite becoming a commoner, was expected to become the fiancée of Febray, the only son of the chairman of the major trading company Franzan Trading Company, based on my excellent grades upon graduation from the noble academy. However, one day, during a health checkup, I was called in for a retest and received a terminal diagnosis. Then my fiancé disappeared. After that, there was a girl clinging to my fiancé's arm...