Hibiki, a full-time housewife who was bored with her daily life, started working part-time at a convenience store to change the status quo. At first she refuses to attack her younger colleague, Hayashi, who she meets there, but she begins to accept her loneliness that she is not getting along with her husband. Even though she feels guilty, she drowns in adultery sex with Hayashi, who has her youth and big cock, and falls into her carnal days...
