This business trip, Riri had to go with the person she hated the most, department head Kita. He had a bad reputation, specializing in sexually harassing female employees, and of course he wouldn't overlook a beauty like Riri. Upon arrival at the lodging house, they found only one room. The department head said it was the company's decision, and Riri wanted to call to check but no one answered at this hour. She couldn't find another place, so she had to endure sharing a room with him. While Riri was taking a shower, the department head drugged her drink with sleeping pills and forced her to drink continuously. And while Riri was asleep, he took advantage of her perfect body. When she woke up, the department head threatened to tell everyone, including her boyfriend, about what happened that night, so Riri had to listen to him. And throughout that night, he had sex with her countless times. Riri was brought to the peak of pleasure by the department head's big cock all night long. She couldn't believe it herself. Despite trying to control herself, her pussy felt crazy pleasure every time the department head's big cock penetrated deep into her womb. And as the sun rose, the sexual pleasure spread throughout Riri's body. The next morning, while the train trip had not yet departed, the department head wanted to have sex with her again. This time, Riri was more proactive, wanting to enjoy the pleasure of being fucked by the department head. He was fucking her while calling her boyfriend. She also made a decision that when she returned, she would talk to her boyfriend about their future. As for the department head, she wanted him to fuck her even more, even when they returned to Tokyo...