Persona 3 Request 17

Much like Request 13 you'll need to head to a room in your school to retrieve this item. That room happens to be the PA room which is on the second floor of your school, nearby your classroom. Knock/enter the room and there will be a brief conversation followed by the students giving you a copy of Gekkoukan Boogie. If you are having trouble finding the room take a glance at the picture below.