Since her divorce when her son was young, Waka has been raising him on her own. She has worked hard for her child and has always held back on what she wanted to do. As long as she has her son, she doesn't need anything else. She has tried her best with that thought in mind, but she just can't help feeling lonely physically. Then one day, she comes across her son reading a pornographic book with a friend. She is shocked, and at the same time, the sexual desire that she had been suppressing until then wells up inside her...