It takes him a while to answer back and when he does, it's a succinct: Sorry. I was at the nurse's office.

Kagami is definitely getting a punch later for tattling on him.

Of course he's reticent about telling him anything, especially when it's only going to worry Kise. It won't exactly paint him in the best light, either, when he should've taken the high road and ignored it in the first place.