I'll bet everything on you

"Do you want to bet on that?"

A determined look flashed through Hino's eyes. "I do. I'll bet everything on you, Ibuki Sumire."

A deep sigh escaped her lips when she heard his serious reply. It seems the people who associate with Yuhi are all like this. When she first started to get to know the guys in Akagumi, she quickly learned they weren't scary. 

'A group of foolishly honest people. 

I have never met people who smiled so much. 

I have never met such honest people.'

All the people around Yuhi are like this. Hino is not different. At first, he seemed strict and very cold, but she recalled when they first spoke properly. Hino learned right away that she genuinely loved Yuhi. He could tell just from their short conversation.

For her, that meant 'this person has been watching over Yuhi preciously.' That encounter was enough for her to change her mind about him.