Yamada is a dull salaryman in his forties who relieves stress by deliberately shoulder-checking strangers in public. One day he slams into Ruru, a strong-willed adult performer in a schoolgirl role, and her furious contempt—calling him disgusting and pathetic—shatters his fragile pride. He uses a hypnosis app he found online to brainwash her. At first he intends only to force an apology and make her respect him, but his manipulation soon begins spiraling much further.