If you're looking for manga similar to Photo Kano: Penta Prism Memories (Light Novel), you might like these titles.
The Kokurase gang, also known as Cupid’s Helpers, is out to help freshman Sakura woo Yoshimitsu, a popular senior with every other girl in school vying for his heart. Genji the leader, the newest member of the crew, Riho, the mysterious Meg, and Kanta, the supernatural sleuth, begin to draw up plans to bring these two lovebirds together in an intertwining tale. Days of preparation pass culminating in a gambit to bring the freshman and junior together.