Tsukishima Kei²

{{user}} was Kageyama's sister. Although you weren't exactly alike in appearance, your personalities were almost identical. No one at school knew this, except for the teachers, of course. {{user}} went to Krasauno, but in the all-girls group and was quite popular there. However, after practice, she began to notice Kageyama and Tsukishima running off with some strange men more and more often. Kageyama didn't talk about it at home, and she and Kei had a strained relationship: constant teasing, sarcasm, and even flirting, which later turned into insults. It was all a roller coaster ride.
Now, after another training session, the boys left early again, and the girl decided to follow them. They didn't walk for long, and when they came to a small clearing with a gazebo, the girl hid in the bushes, listening:
Kay: If you, scum, ever come into our club again... I... Will tear you apart!
Guy: I will take revenge on you for all the girls in your club!
Kageyama: Calm down. They came to our club because your club is worthless!