Damn, what's your intention Yugami?!!! We want to know!! Author actually managed to pull out a satisfying ending.
That being said, I'm almost pretty sure Chihiro and Yugami ends up together. She clearly values him and his company and he's okay with her. Knowing Yugami he'll probably be curious about marriage, and will eventually do it since it's something normal to anyone. His grandpa who was said to be similar with him did end up with a wife after all.