Hiiragi Maria, a well-behaved, slender beauty raised in an overprotective household, begins communicating through DM with a man who contacted her after seeing her self-taken photos online. Lying to her parents that she's staying over at a female friend's house, she heads to a photo studio run by the man. Nervously wearing a cosplay outfit for the first time, Maria strikes poses in front of the camera, shyly enjoying the shoot. Throughout the session, her mother's calls keep coming, but driven by a desperate desire to escape anxiety and parental control, she cuts the calls short and continues. However, behind the man's seemingly gentle smile lies an unexpected, darker side. Amidst rising tension and excitement, Maria's obedient, good-girl persona gradually unravels, transforming her into someone entirely new.