Uta is a new employee who has recently joined the company, she is dating Satou, her senior and colleague. Because the company prohibits relationships between employees, both of them have to hide their feelings, but their secret is accidentally overheard by Uta's department head. Uta's department head is a middle-aged lecherous man who enjoys sexually harassing others. He constantly gropes Uta's buttocks whenever he has the chance, making her feel disgusted and wanting to stay away from him. However, things do not go as she wishes, this time she is assigned to a business trip with her superiors, and one of them is the department head she despises. After finishing the work, the three of them go out for drinks together, she orders a light lemon drink but the department head secretly tells the bartender to change it to a stronger lemon drink. He also continuously pours her drinks, causing her to quickly get drunk and pass out. When she wakes up, Uta finds her department head forcing his penis into her mouth, her clothes are stripped off revealing her huge breasts and her plump pussy! The department head has also recorded this scene and threatens to upload it online if she does not obey. But his big long cock combined with his expert skills makes Uta reach climax again and again, she gradually forgets everything, even when he sends the video of them having sex to her boyfriend, Uta doesn't care, she just wants to have sex with her department head, enjoying the pleasure he brings...