"Shall I be your sex practice partner?" Miyu, who lives in a single-parent household, has lived her life as a mother, not as a woman, with her child's growth as her purpose in life. Until her daughter brings her boyfriend home... The presence of her daughter's boyfriend awakens the woman in her. The night she sees her boyfriend, she reaches her fingers out to her crotch for the first time in a long while and indulges in masturbation, her body trembling with pleasure. Miyu takes action when her daughter is away at a training camp. She calls her boyfriend to discuss something about her daughter, and runs her fingers over the young man's body...