Sasuke was openly contemptuous of the blonde idol singer. She hadn't suffered, she hadn't struggled, she was the sort of happy little twit he most abhorred. Ninjas were about being dark and vengeful and deadly.
Of course, the fact that she'd flickered across the room then bashed him four times across the head with her tonfa before he'd realized that the girl really was unhappy with him.
He was so used to fawning fangirls that he realized, about the time he'd dodged her and found a thrown desk had predicted his trajectory and impacted his head - that maybe this girl wasn't quite as pathetic as most of his fanclub.
"Hey, stop it, stop it, STOP IT!" said Sakura, rising to defense of her crush - lifting her own desk and throwing it at Naruko.
Naruko grabbed the incoming desk, did a half-spin to increase momentum, and then launched it at Sasuke.
Sasuke knew it was coming and tried to do the same thing. Except he'd gotten a little dazed with all the head-blows.
Sakura saw the incoming desk and had that momentary freeze as she realized what had just happened. This was immediately followed by being knocked head over tail into some other desks and a lot of hurt.
"Oh dear," said Naruko, pausing as she noticed the broken desk and passed out girl. Then another desk smashed into her and such considerations were discarded.