Be in the yearbook club and date Damien, eventually he will visit your club. Choose to blow him in the storage cupboard.
There's a full walkthrough including guides to every scene in the gallery btw in the web coursair option in the in game laptop. Here's a link outside the game too:
https://docs.google.com/document/d/1oop9YfcGfvuYI_1vuKepCPmQho_jD6oGarY6rvw7xSQ/edit?usp=sharing