Despite being Rika's senior, Nakaniwa is extremely clumsy, often making mistakes, even late. This time the two were assigned to work, Nakaniwa was still clumsy as usual, fortunately thanks to Rika, the negotiation also ended well. But because they were engrossed in welcoming partners, the two did not pay attention to time, leading to missing the last train. There was no other way, the two had to spend the night here. But unlucky, looking everywhere there is only one room, so both of them have to share their rooms. When returning to the room, the two continued to drink. Until the next morning, when he woke up, Nakaniwa suddenly discovered that Rika was naked lying beside him! Moreover, when Rika woke up, her attitude towards him was different from yesterday. Rika took the initiative in soliciting, seducing him. Although he did not remember the story yesterday, it seemed that Nakaniwa's dick conquered Rika ...