Mira:

The girl pressed on a button on her phone and she called someone. When the person she called answered she only said one thing. " It's been a long time Arc. I'm here in the city, if you still want to take revenge I'll be waiting for you." With that she she ended the call.

Arc:

Arc was lost in thought, but he snapped out of it as his phone ringed. He answered his phone, it was an unknown number so he had no idea who called him. " Hello ?" He said in to the phone. As he heard the callers voice his grip on his phone was harder. The second the call finished, a huge killing aura came out of him enough to make everyone inside a 30 meter radius feel it. He saw Satsu on the stairs and taught about yelling at her, but he didn't. ' No, this is my fight and my fight alone.' He taught to himself as he turned around and started walking away from the school. The killing aura increasing by the minute.