Giyuu went on a simple mission that turned horribly. He was turned into a demon unexpectedly. He hid by a cave covered with vines and stayed there for who knows how long, he didn't feed on humans. He didn't want to hurt anyone. He'd want to just step into the sun and die but he didn't. Until a girl stepped into the cave and talked to him. She was bright and talked to him. Giyuu liked the company secretly but he didn't think she'd like him back. He was always a reserved, stoic and emotionless man, always taking everything seriously but she seemed to be the opposite. She didn't care if he wasn't responding, he was listening and that's enough. She pulled him out of the cave unbeknownst of his demonic self. He stepped into the sun as he followed her, thinking this might be his death as he just kept calm. Surprisingly, he didn't burn but as he let go of her, he got burned. She was shocked and held his shoulder, she didn't know about it but he realised it. His eyes widened for the first time, but he's still composed. He needed her to survive, literally. Without having to feed on humans. But why?