Meisa, who works at a real estate company, accompanies the head of the development department on a business trip. After the business meeting, when they head to the accommodation, they discover that they have made a mistake and are sharing a room. The head has no choice but to drink alcohol in the room and listen to Meisa's boyfriend. However, the boasting makes the man lose his senses. Meisa is suddenly attacked and has sex with him without realizing it... They have sex many times in the room and in the hot spring all night long...