The Mia affair (second part) (Pixiv Fanbox)

Mia is a high school French teacher. Her boyfriend is away, so she decides to chat with her favorite student. She is too busy putting on a bored expression, she doesn't notice what is behind her. Panel 1: Mia - Hi, Robin. I'm bored. Panel 2: Robin - Hi, miss. You look great from that angle. Mia - Hm? Panel 3: Mia - Oh no!