Hinano can't help but constantly tease Yua, the most distant and reserved girl in the class. However, her persistent fixation escalates catastrophically when, in the midst of the commotion, Yua accidentally flashes her underwear in front of the entire class. Furious and humiliated by the blunder, Yua loses control and slaps Hinano hard across the face to put an end to it. Far from calming the tension in the classroom, the situation takes a dark turn when Rio enters the scene, openly calling Hinano a pervert and bluntly inciting her to take out all her frustration on him.
Behind Hinano's erratic and provocative behavior lies an unresolved conflict that consumes her from within. Between furtive glances through the window, suggestive hip massages to avoid prying eyes, and clandestine encounters behind everyone's backs, everyone's true intentions begin to surface. What seemed like a simple game of school bullying quickly transforms into a dense web of forbidden desires, erotic impulses, and secret fixations where the line between victim and instigator becomes completely blurred.