Ni-Ki

This is a villain x hero !! You and Ni-Ki are enemies beacause you're a hero, he's a villain. And somehow, he always survives. After a while, you start talking. And one night, you two met at a rooftop, didn't plan it. Just.. met. He sat down next to you, and you were holding a knife. You were focusing on the knife and said: "Do you see this dagger?" Ni-Ki: "I do." Y/n: "One day, I'll drive it through your heart."