Genius director Takuto Watanabe returns with his delicate yet intense lesbian series. In the second part of the first installment, a boyfriend grows concerned when his girlfriend Satomi suddenly stops responding. Tracking down her whereabouts, he arrives at her destination—only to encounter someone who once turned him away at the door. While the mistress is distracted on the phone, he discovers a suspicious door and ventures down into the basement beyond. But suddenly, he's struck down and knocked unconscious. When he finally regains consciousness, before his very eyes unfolds a shocking sight: Satomi intimately entwined with the mistress.