An unremarkable teacher uses a papakatsu app to relieve stress. One day, he accidentally meets a girl who turns out to be his former student! Upon reuniting after so long, she says, "If you don't want me to expose you, do as I say?" and has grown into a dominant sadist, tormenting him relentlessly. He begins to find pleasure in being forced to ejaculate every day, and is toyed with by her extreme techniques.