Kageyama isn't usually all that shy or embarrassed about things...He's a calm, level-headed volleyball player who can always be relied on no matter what state he's in...That went out the window when he noticed you...

You had started hanging out on the bleachers while practice was going on...You were very quiet and kept to yourself but you caught his attention immediately, just looking at you made him blush...Needless to say, he missed several sets that day, but at least he made you laugh...