The Villainess’s Terminally Ill Sister

Alicia isekai'd into the terminally ill older sister of the villainess in her friend's novel. What is this disease? I die just by looking at sunlight. They say tigers leave their skin when they die, and people leave their names, but I'm really in danger of only leaving my name behind. 'Anyone, please tell me this is a dream.' Now that it's come to this, I have to find Nine, the sub-male lead who develops the cure. The survival plan was simple. Leave the mansion and meet Nine. → Persuade him to make the cure. → Obtain the cure. → Success! "Get lost. I've seen all sorts of beggars." But why is this sub-male lead like this? Where did the sub-male lead who tried to say even one more wor...