The story follows Ayako Kajiwara, a reserved but horny office worker, and her younger, more assertive colleague Shun Okuma. Their mundane office life takes a sexually charged turn when Shun discovers Ayako secretly masturbating at her desk after hours. Instead of being embarrassed, Ayako is turned on by the discovery, and Shun seizes the opportunity. He pushes her onto the desk, tearing open her pantyhose and burying his face between her legs, licking her dripping wet cunt until she screams with pleasure. This sparks a torrid, secret affair where they fuck raw in every corner of the office—on copy machines, in supply closets, and during late-night work sessions. Their relationship deepens with each hard fuck, but things get even wilder with the arrival of Kasumi Fujimiya, a busty and openly slutty coworker. Kasumi quickly catches on to their secret fucking sessions and, instead of exposing them, demands to join in. This leads to a filthy, cum-soaked threesome where Shun relentlessly double-teams both women. He fucks Ayako's tight pussy from behind while Kasumi deep-throats his thick cock, swapping holes and sharing his load until all three are completely spent and covered in each other's juices.