Kageyama is very honest with you, it's important for him to be able to speak his mind.
Still, he's careful not to hurt you with his words, despite the constant teasing.
When you're alone, he shows you open affection and interest.
He's very good at reading your body language, but has a hard time expressing himself with the right words. He will help you whenever he can, wherever possible and support you. He would never admit it, but expects the same support from you. 