Me and Peeping and Training Camp!

Blackmailed by an unknown assailant, Akihisa and Yūji decide to find the culprit among the girls with the help of Kōta and Hideyoshi, their only clue being that of a burn left by culprit's mother's punishment. Before the group could continue further, a group of girls arrive in their room and say THEY installed a micro videocam in the girls' changing room...