Wooyobitme's manga / #Doctor(4)

The villainess dies in her first life (historical era) and reincarnates into the modern world, deciding to save lives this time around to atone for her sins, she becomes a doctor. She dies again, and returns to her previous 1st life, before she became the villainess. She uses her knowledge of modern medicine from her second life to help the historical time period she now lives in once again. She is also being courted by the prince, who in her first life, was the one who executed her.

A doctor Uke who has the power to see a persons remaining life span meets a yakuza Seme whose number he cant see. They get involved and have sex, after a while the yakuza's number starts showing and he has less than a year left. The doctor is heartbroken but stays with him. Living in the moment. Manhwa ends without us knowing if he died and how.