Rikon Totei no Keiyaku-kon nanoni, Reikoku Koushaku-sama ni Shuuchaku Sareteimasu

Mila, a girl raised in an orphanage, was born with a rare ability—she can absorb magical energy from objects and people. Her adoptive father, Baron Weston, exploited her gift to cleanse cursed weapons and dark artifacts, wearing her body down to the point that doctors told her she had only a year left to live.