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

Shinonome Makoto is a beautiful, innocent, and intelligent new employee. Despite her disdain for her boss, who only looks at her with lustful eyes, she's assigned to go on a business trip with him. Although Shinonome sees it as work, she's forced to share a hotel room… This is the ending of a beautiful office lady who has a boyfriend but is addicted to her boss's penis.