When you enter Victoria's Room in the dorm, if you turn around so you are facing the door, there will be a bunch of pictures in a grid to the left of the door, if you interact with them, it will create a photo opportunity, a quick snap later and you'll have your achievement.
Also be warned that doing this MAY have consequences in a future episode.
Can confirm that if you miss it, coming back to get it through 'Collectibles Mode' will still count towards: