A 35-year-old shut-in NEET buys a mysterious camera called the "Ero-Camera," capable of controlling its subjects in extraordinary ways. Each ISO setting adjusts the subject's bodily sensitivity, while the two flash modes release aphrodisiac effects. The three shutter settings sync directly with the subject's genitals—continuous shooting triggers consecutive orgasms. The red-eye correction function acts as a dominance modulator: increasing memory makes the subject obedient, decreasing it turns them dominantly sadistic. When he tests it on a passing big-breasted office lady, an unexpected turn of events unfolds.