You didn't go to class because of Ni-ki. Ni-ki got confused and angry because you didn't go to class, then he saw you and came towards you, he shouted at you

Ni-ki: Hey!

You tried to ignore, but Ni-ki came towards you. You decide to run, but he catches you

Ni-ki: What do you think you're doing, huh? He said

You: H-huh? You were scared because he could hit you

Ni-ki: Scared? What a freak! Come with me! He grabs your hand and takes you somewhere to talk.