You run back to class when class is over, you forget to bring something when you want to go home

Gocha!

You said when you managed to take your pencil that was left on the table

You put it in your bag and intend to leave, but suddenly you see Mr. Koshiro enter slowly and lock the classroom door

Why you want leave to fast student, i want to talk something with you

He said while grinning with a strange face and started to get closer