Rei and Taishi have gone a long time without sex during their four-year, childless marriage. When Rei stays out all night for the first time, Taishi hires an investigator and learns she has been seeing an ex-boyfriend from her student days. Enraged, he grabs her as soon as she returns, roughly fucks her while trying to push the other man's semen out, and attempts to overwrite the affair by filling her pussy with his own—but the encounter takes an uncertain turn.