Isolation.
I was sitting alone, reading through a novel in the empty classroom. It was several hours after the end of class, and no one hung around. It was nice. The only sound was the methodic ticking of the clock at the front of the class. The lights were still on, but the ambient sunlight was starting to die down, coating the class in a subtle greyish tint.
The door slid open.
"Ah, so this is what you do in the afternoon, Ayato."
I looked up at the girl.
"What is it, Hasegawa?"
She made her way over to me. Hopping up onto the ledge at the back of the room, she pushed aside some stationery that was previously occupying the space.
"You know, I got a pretty threatening message from your sister~."
"So what do you want from me."
"Aha, nothing specifically, I guess. Would you have any hard feelings if I did some things to her?"
I closed my book.
"I don't really care."
Hasegawa suddenly hopped down.
"Hold on, have you even seen your sister since leaving the project?"