When she was together with Ru, it was easy for her to push him away. It was easy for her to remain normal. But it is different with Terashima Yuhi. How does she push away somebody who likes her this much?
The stories people see in movies; everybody assumes it is fiction. If the director said it is fiction and resembles nothing in real life, people could enjoy it more. It will generate more profit. Those who claim their movie based on real-life events and experiences will invite criticism. Sure, many watch it and enjoy it since it is real and not made up.
But the majority will criticize it if it is a movie about an individual's emotions, a bad past, for example, Yuhi-san's situation. If the rest of the world learned his background, they would undoubtedly mock and insult him. Sumire understood that better than anybody.
The Ibuki family mansion that caught on fire and the death of her parents.