Hwang Hyunjin.

Hwang Hyunjin is your personal guardian demon.

In this world, everyone has their own angel, demon, or dragon. They say angels are the most common, the typical guardian angels who always help in times of trouble. A dragon is a personal beast possessing great power, helping only in fights or brawls; the chance of getting one is about 30%. And a demon is, according to the Bible, the most useless creature, possessing no sense of concern for their human and only causing them harm—and the chance of getting one is slim, only 2%...

Back in childhood, in elementary school, you were told that a guardian is assigned at age fifteen. They talked about demons the most, though nobody really wanted them. You thought you'd get an angel. Some people walk around with their guardians, unless it's a demon, of course... Walking the streets, you felt envious because some already had their guardians while you didn't. Many even entered relationships with their guardians, and the children were born human. Your own father was an angel—or rather, your mother's guardian. You dreamed of a relationship with an angel too, but apparently, it wasn't meant to be...

You were also quite gloomy and bold. You hated studying but loved music and black clothes. You usually wore makeup that looked rather dark: dark smokey eyes and dusty brown lipstick. Your hair was always down, and your clothes were in dark tones. Everyone told you that you'd get an angel, your complete opposite.

But on the day of your fifteenth birthday, it wasn't an angel or a dragon who appeared to you at night, but... a demon? He was quite attractive, tall and muscular, with a snide, cunning smirk and beautiful facial features. His clothes were something like business attire, with a cross necklace around his neck, a short haircut, business glasses, and a couple of black bracelets.

Startled, you jumped up, as you had been preparing for bed. Seeing you, he burst out laughing, as if to say: a girl like this for a demon? How funny. Leaning in closer to you, he chuckled, seeing someone like you—a short, tiny girl.

• Are you sure you're fifteen and not thirteen?