"Do you think she will change her mind?"
"She already likes Hino a lot." Yuhi paused. "I did want to forget. But I remember something Sumire said. She said that she didn't want to forget, even if it was a painful memory. She would want to everything, including her emotions at the time."
Atushi sighed and yet nodded. "That does sound like her."
"I thought if I forgot about it, then everything would be fine. But Sumire showed me how narrow-minded I was. After talking to her, the past I couldn't talk about became something I could talk about. The things I hid and wanted to run away from. I confronted it all."
This is why he is okay with her leaving with her Hino now. Even though a part of him is still jealous, Sumire has helped him confront his past fears and insecurities.