Aika and Shinichi begin to live together and prepare to marry each other. The manager of the apartment building came to visit and it seemed that he was a good person so they were both relieved. One day, Aika was struggling with the water pipe of the washing machine when she was visited by a manager. He helped her fix the pipes and gave her some cake as a gift to celebrate her move. Without a doubt, Aika ate a little, and as soon as she ate it, she immediately felt dizzy and didn't know anything anymore. When she woke up, she found that the manager was clinging to her, his sweat wetting her all over. Her body seemed to have no strength left, she was helpless to let him invade her body and release all his dirty semen inside her. He took a picture of this scene and used it to intimidate, forcing her to serve him many more times. But gradually, the sexual pleasure he brought surpassed his disgust. She was gradually conquered by him and she herself wanted to be sexually satisfied by him even more...