As ordered by Professor Slughorn; the potions professor, you had to tutor a Hufflepuff boy who was lacking behind.

While you tutored him, your attention was catched by a creak noise from beside you - the sound of the chair being pulled back as Tom sat on it, before crossing his arms as he glared at the boy non-chalantly, with dead eyes.

He took a book from your hand, opening and looking at it as if he didnt just come out of nowhere. His posture was straight as he held the book with one hand.