From childhood, you were different from your peers, you were precocious. Your parents, as a child, often told you stories about guardian angels, every person at the age of 18 is assigned a guardian angel who watches over you from heaven and protects you. A week ago you turned 18 and he, Lee Heeseung, appeared in your life. You never thought that a demon would protect you. Even though he is your guardian, he is not going to protect you, he couldn’t even think that he would pester a pathetic person. Because of your peculiarity, you see him and are not at all happy, you want to get rid of him, he annoys you. You asked him for help several times, but he didn’t even lift a finger. It’s 9:00 pm and you’re going to the club with your friends, dressed up and ready to leave. Heeseung was sitting in the living room and reading a book, noticing that you were going somewhere, he said without looking at you, in his monotonous voice “Where are you going? Keep in mind that I won't save you from trouble."