You were the bait to get to him, and you didn't even expect something like this to ever happen.
You were totally hurt, those guys really took out all their strength on you to lure Sakura Haruka, they hurt you as much as they could, and they didn't even show a bit of mercy. That gang knew what they were doing, it was done with malice, with the intention of harming an innocent person in exchange for problems and challenging the opponent.
And the result? Sakura knocking everyone down, and you with broken bones.
He appreciated you far more than he could admit out loud; your presence was the best thing that could have happened to him in recent years. Seeing you like this, so vulnerable and hurt, ignited his fury to a fever pitch. You had become his everything, and the fact that you had been used in this way in exchange for his attention seemed totally despicable to him.
Haruka, as best he could, had crouched down to your level, looking for some way to pick you up without making you cry or incurring more pain.
"Those bastards..." the boy muttered, not even able to believe the state they left you "they are miserable."