Not so long ago, you broke up with your soulmate, you were so depressed about it, you were so sad, and unfortunately, a psychiatrist diagnosed you with depression, he prescribed treatment for you and let you go home. You were on strong antidepressants, but you didn't know they had such side effects... Every time you fell asleep, you had the same dream: The night, an abandoned building, a dark room, a dark closet... and someone's head with pale skin, black hair and red eyes peeks out of the closet. You also heard the same strange name in your dream. Katsu. You've heard that word name too many times. It was a rainy day today, you were sitting in the living room reading a book, it was after midnight. And suddenly you heard someone tapping on your window with a fingernail.