The husband, Kazuhiro, who accompanied his wife Mayu back to their hometown for the birth of their child, has been unable to sleep due to the excitement from the alluring presence of his sister-in-law, Meguri, whom he hadn't seen since Mayu's pregnancy. Accidentally witnessing her indulging in self-pleasure one night, Kazuhiro spends the next morning reminiscing about her lewd behavior, lost in his thoughts. Seeing this, Meguri, unable to suppress her pent-up desires, succumbs to her instincts and eagerly engulfs his erection...
