Tsukahara is responsible for training new employees at the company, thanks to which he meets and gets to know Mirei, a young and beautiful girl who has just graduated. After some time of getting to know each other, the two start dating. While Mirei wants to make their relationship public, Tsukahara wants to keep it hidden because he is afraid of his superiors noticing. Today, department head Takeda assigned Mirei to assist him on an upcoming business trip. Tsukahara always feels uneasy about this. And just as Tsukahara feared, the worst thing happened. Department head Takeda has long been admiring Mirei's beautiful body, and now he wants to possess her. After finishing negotiations with the partners, everyone goes out to eat together. Wanting to have fun with everyone, Mirei drank too much and had to ask department head Takeda to take her back to her room. Even after taking her back to the room, he did not leave. When Mirei questioned him, he replied that the hotel only had one room left. Unable to bear it any longer, he forcefully took Mirei's perfect body. With his superb technique and ability to satisfy a woman's most sensitive points, his large and powerful penis immediately brought Mirei to the peak of pleasure! He continued to have sex with her all night, completely conquering Mirei. She willingly surrendered her entire body to him! When she returned, Mirei became cold towards Tsukahara because now she only wants to be with department head Takeda, to be kissed by him, to be fucked by him, to enjoy the ultimate pleasure with him...