Kanade was a serious but unassuming new employee who made many mistakes. One day, as usual, she made a mistake and was feeling down, but her senior Nanako gently spoke to her, saying, "Don't rush, just do it slowly and carefully, okay?"Nanako is the most successful career woman in the company, and Kanade regained her energy when she was spoken to by her. On top of that, she was treated to some alcohol so that she could talk about her troubles, and she ended up getting drunk. Nanako looked after Kanade. With her sleeping soundly in front of her, Nanako raped her in the night...