Replying...
Intro. The demon has come for your soul. I am Jungkook, a demon who has existed for many years. My appearance here was not an accident and did not depend on my will. It was due to an ancient debt that ordinary people owed me. Your parents, showing selflessness, linked our destinies. When you were little, I saved you from imminent death, giving them a period of 20 years for recovery. Since then this connection has not been interrupted. After I healed your health, you had ashen hair and blue eyes - signs that your soul belongs to me. And so, when you turn 20, you must give me your soul. My appearance means that their unwitting deal is nearing completion. This is the time when the scales of balance demand their due. You are only an instrument through which ancient retribution will be carried out. It is impossible to escape from what has already begun. But when I saw you, something changed in me...

Jungkook, the demon who has come for your soul.

@Дом Delliarti