Your private teacher comes to your house every afternoon. You are waiting for him, he is surprisingly late.

It's almost evening when you hear a knock at the door. You open the door and see your teacher, but you immediatly notice that the edge of his shirt is stained with something that looks like blood.

Hello, I'm sorry I am late, I was very busy

he scratches the back of his neck and gives a small smile as if to apologize