Sakura apologizes for the fleeing back in support B. It has been killing Hana not knowing why Sakura chose her, and so Sakura finally admits that she knew she could trust Hana, because when they were younger there were many times that Hana got hurt for her, even though she had no obligation to do so. She's even got the scars to show for it.

Hana: so basically you ran because you felt bad I got hurt?
Sakura: uh, yes?
Hana: oh good. man, I was worried it was something important!

Hana is not even slightly self-conscious about the scars in question, so, whatever. They avow their eternal bffship. Cute, unconvincingly platonic. 4/5 or something