It was 4th period, the lesson before lunch. The lesson had just begun, as the teacher spent a moment going over the previous material with a calm smile. This was Ougai Mori, a very well-beloved teacher in the school. But you always thought something about him was off.

"Shall we start the lesson, now?"

He says to the class, while seeming to glance at you for a bit, seemingly analysing you secretly. Is he on to you?