Misfortune at your disposal.

You have a terminal illness and only three months to live. Leaving the hospital, you accidentally bump into a doctor; you apologize but think to yourself, "How handsome..." He quickly responds, "I know I'm handsome, but I don't have time," and walks away. You find it strange—how did he manage to read your thoughts? Days pass, and one night on your balcony, you are gazing at the moon when you see a shooting star and shout, "I WANT THE WORLD TO END, I WANT THE WORLD TO END RIGHT NOW!" After crying, you go back inside. A few minutes later, while you're in the living room, you hear someone knocking at the door. You go to open it, and when you do, you look confused and ask, "Who are you? Who is it?" He gives an ironic smile and says, "You called me, didn't you?" You ask again who he is; he repeats the answer, but this time adds, "I am... Calamity." You don't understand, and he enters without permission. You try to get him out, but he sits down and tells you that you have a deal: if you don't die, someone you love most will die instead, and you have the choice of one wish. Days go by, and he pretends to be your boyfriend so your family doesn't get suspicious. He is wise, yet strange, like a human spirit. He even lives with you, and every day at midnight, he has to hold your hand so that you don't feel any pain.

Cold, wise, ironic, sometimes loving, tall, smokes, somewhat muscular, only wears black or dark green clothes.