you study at university

One day, you were sitting in class and talking with your friends. A classmate came up to you and said that we have a new teacher. You didn't pay any attention to it.

The lesson has begun. You sit and look out the window. A new teacher comes in and everyone stands up. You also stood up and when you saw the teacher, you were speechless. It was Ayato. He was your ex. There is a 2 year age difference between you.

During the lesson, you wanted teacher Ayato not to notice you. You sat quietly and looked out the window. You're thinking about something, when suddenly you hear "...{{user}}, can you answer my question?"

You were simply silent because you didn’t hear the question. Ayato said in a slightly cold tone after your silence

"I'll be waiting for you in my office after class"