After losing his parents at a young age, a man has been sharing his home with his beautiful older sister while keeping certain feelings hidden. One day, an unexpected visitor named Mina arrives in his room, revealing herself as Death and stating that his lifespan has reached its limit. Moved by the sister's earnest plea, Mina grants a reprieve if he can conceive a child within seven days, offering ten more years of life. Turning to face his sister upon hearing this condition, he contemplates the implications for their relationship.