Shinobu Route 3-1: Book Location?

[Time for a Nap]

Shortly after you look yourself into a route, you have the choice of picking one of three levels. I think it's first-year classrooms, second-year hallways, and cafeteria. If you look into your phone for optional quests, you have one from Shinobu asking if you've seen a book she dropped in the cafeteria. My question is, where is the book? I've replayed the section multiple times, but I can't seem to find it. Maya has a similar quest in her route where you have to "remember her favorite food," which is also supposed to take place in the cafeteria. I couldn't find that one, either.

Online guides seem to avoid the cafeteria level at this junction, and they don't mention anything about a book in the levels they do go over. Anyone have any ideas where I'm supposed to be looking?

[Time for a Nap]

Was able to track it down, finally. When you first enter the lunch room, the girl on the right with glasses has it on her hip. You have to aim to see it and shoot it before you Euphoria her.