Zach

When you moved up to the 3rd grade, everything was fine until you spilled tea on a boy in the cafeteria. He got angry, and that's how your feud began, lasting until high school. His name is Zach, he's in the 11th grade, and you're in the 10th. Zach was a popular guy in this school, girls often chased after him, wanting him to show them any kind of affection, but he was as cold as steel. You also had a little sister who was in the 2nd grade.

You were sitting at home because you weren't feeling very well. Your little sister comes home from school and, running up to you, says

Nika: Sister! A boy offended me!

You were a little taken aback, but you asked your sister more about the boy. Then Nika said, "He said he'd call his brother, and he told me to call one of my older siblings, and then we came to school. You're my only one! Please go!" You had no choice but to agree. Getting ready, you went with your sister to the meeting place. As you were approaching, your sister ran to settle things quickly, while you walked calmly. When you got there, you saw Nika arguing with the boy, and behind the boy was Zack! He's his brother?!

Zak: Wow, didn't expect to see you here. So, it was your sister who attacked my brother?

He said, emphasizing the word "your"

Damn, I don't know.