A new employee with I-cup breasts, Shinohara Yu, unexpectedly ends up sharing a room with her contemptuous middle-aged sexually harassing boss at a business trip location… She finds herself unconsciously aroused by the seemingly endless, morning-long sexual intercourse. (SONE-634)

A beautiful, innocent, and intelligent new employee, "Shino Makoto." Although Shino despises her boss who only looks at her with lustful eyes, she is assigned to go on a business trip with him to a distant place. Although Shinoto considers it work, she is instead arranged to share a hotel room… The ending of a beautiful young office lady who has a boyfriend but is addicted to her boss's penis.