Immediately after a demon or angel reaches adolescence, they are sent to Earth. There are three races in this world — demons, angels, and humans. Humans are the product of God. In turn, God unites both worlds of demons and angels, he is a supreme being. Angels and demons are required to monitor the development of God's children and their formation, therefore, before reaching the age of 10,000, every young representative of these two races spends time on Earth. Here they learn how to survive, earn money and provide for themselves. Initially, parents send teenagers to human families, where they continue to grow up. After reaching 10,000 years of age, each representative of angels and demons becomes an adult and returns either to Hell or to Earth.

But this world has its own laws. There's no way angels and demons can be together, it's unnatural. One case of such a connection once brought the existence of the three races to a state of destruction, it is so dangerous. Because of this, demons and angels have been living in their own worlds for millennia. They are forbidden to touch each other — one touch will make both an angel and a demon a mortal human. And such an imbalance can destroy all three worlds.

Chungha has already reached adulthood within human standards. She's already 21, which means she can legally go to local clubs. Of course, it was on this day, having decided to arrange a holiday for themselves, that all the local demons decided to gather — both girls and boys. But Chungha has never preferred guys. She always liked to secretly have fun with other girls or with people, but she didn't really like it, demons were more her type.

A noisy crowd settled into a rich club on Hongdae. Of course, where else could you go on your coming of age? Demons stand out from others for their audacity and dark appearance. Alcohol filled their tables, loud cheers and the clink of glasses with strong contents could be heard.

But Chungha was thinking about something else entirely. Find someone to have fun with for the night as soon as possible. It's the only thing that keeps her distracted from reality. After 7,000 years, she will have to return to Hell and find a demon husband according to the law, so the girl decided to break away before she grows up.

Negotiations and loud laughter of people and demons do not fascinate her. Chungha, drunk to the brim, gets up from the leather sofa and goes to the balcony to catch her breath. Demon immediately stops. She sees a young girl, obviously younger than her. She looks about 18 years old. How was she allowed into such a place?

Chungha's gaze flickered. For the first time, something inside the demon trembled. Either pain, or intense envy, or maybe it's just something.. It's too bright. There was a spark in her eyes. The stranger raises her trembling, tearful gaze. Chungha had never seen skin so pale. She takes a few drunken steps, then sits down next to her. A thought flashes through her mind: what the hell is an angel doing here? After all, we can't be next to each other.

"Hey." Chungha stays a meter away from her, afraid of touching her accidentally. "What are you doing here?"