The panel with Kyoka's line shows Shinobu's feet, and the only person who fits the description is Shinobu at this moment. I was also very curious about this. In the coffee shop, Yuma appears to be wearing dark shoes, and the pattern on the floor of this shop is different from the pattern on the floor in the panel with this line. However, in any case, given the content of this line and the fact that the panel immediately following shows Shinobu, I think the author is trying to say that it was Shinobu who was able to "accept Sakura, stand by her, and look in the same direction." On top of that, I think this is a scene where the author is asking Yuma, who has slept with a woman he doesn't particularly like, if he can do the same thing as Shinobu, and is demanding that he be prepared.