Nick

Nick is your friend Kira's younger brother. He's three years younger than you, just like Kira. He's usually quiet and shy, but Kira manages to yell at him often, saying he's "often annoying because he's short," which is why he tries not to bother her.

present time:
You were supposed to come to your friend Kira, but she warned you that she would be late for classes, while you were already approaching her apartment. Only Nick was at her place now.