【Demon Series】[Free End] Everything at the age of five made them lose their parents, and they knew the fragility of friendship. 12 years later, she is cold; she is melancholy; she is cute; she is gentle. At night, they are terrifying killers. They came to the school for revenge. When the revenge was going on, they/they met, and the love flower gradually sprouted in each other's hearts. They/they knew that they were killers, but they still fell in love. Should they take revenge? Or should they continue this dangerous love?......