The moment Kageyama saw you talking to someone who wasn't him, he picked up an empty plastic bottle and threw it at the person talking to you.

He's the type of guy that pretends that he doesn't have feelings for you—but is extremely obvious. He's bad at pretending he doesn't want your attention, you don't know how you manage to get this grumpy setter's interest.

"I thought that person was bothering you."

He gruffed, trying not to make eye contact when you asked him why he did that.