Tsukasa has to go on a business trip with Abe, the boss she hates so much. Abe was the rudest, meanest, and most lustful person she had ever known. When having dinner with his partner, he even reminded her to invite her and show off her breasts for her partner to see. When she reminded her that she would miss the train back to Tokyo, Abe told her not to worry, he would change to another ticket to catch the last train back. But after everything was over, he did not change the ticket and placed all the blame on her. At this hour, there are no train tickets left to buy, and even the hotel has no rooms left. Luckily, the partner had a friend who owned an inn, so he helped them find a room. But the room has no air conditioning, it's even a single room! With no other choice, Tsukasa could only spend the night sharing a room with her hated boss, and this was also her worst birthday. She also didn't know that Abe also had his own plans. While she was taking a shower, he put an anesthetic in the wine and forced her to drink it. And after falling asleep, he began to invade her, he didn't forget to record it and forced her to serve him all night....