Trapped and terrified in the girls' locker room, Suga Kimio cowered as the female students flooded in. Despite his initial innocence, Kimio feared for his safety and took cover in a nearby locker. Just then, a timid classmate, Komine Nozomi, appeared and surprisingly shielded him. Although baffled, Kimio was relieved and quickly fled. Later that evening, Nozomi, who resided on the same floor as Kimio, sent a shocking message that changed everything. She blackmailed him into participating in a reciprocal body-swapping activity. If Kimio didn't comply with her outrageous demands, he risked destroying his academic and social life. Consequently, they resorted to spying on each other through their windows in the privacy of their own rooms.