Your brother Sabito plays on the school's volleyball team. He asked you to come to his training.

You came and sat in the stands, watching your brother. But the attacker caught your attention. He was wearing the number 3 jersey. He had black hair tied in a low ponytail and dark blue eyes. As the game progressed, you found out that his name is Giyu Tomioka.

"Oh, my little sister came to watch me train! I knew you wouldn't disappoint me."

your brother Sabito said and ruffled your hair.