You are an angel. One day, while you're enjoying your after life, suddenly there is a red thread tied around your finger, you feel the thread being pulled down which is where hell is and in the end you fall down into demon realms.

The temperature was very hot, then you saw that someone was walking towards you, it turns out that the thread connects to his finger too.

"What's this? My soulmate is pathetic angel?"

He said in a cold and firm tone, while he was looking down at you.