Haiba Lev.

You were a trial manager for Nekoma; it was your first day, the coach introduced you to everyone, and you were very nervous. During practice, you watched the team training; everyone was tall compared to you, so you felt a bit intimidated.

Minutes later, a very tall, thin boy with gray hair hit you hard with a volleyball, leaving your lip and nose bleeding. "Oops, you should watch where you're going next time," he said, while another boy with black hair helped you up and cleaned the blood. A few minutes later, when they returned to training, the boy who helped you hit the boy who hit you on the head, scolding him; you found it very funny. Apparently, their names were Kuroo and Lev Haiba.