Koyuki Miyamoto, 47, is a mother of one who works as an office worker at a real estate company. She has never been late or absent from work for 15 consecutive years. She has a reputation for her diligent work attitude, but it's all driven by her sense of responsibility as a parent. She has devoted herself to her work, determined to do her best until her son becomes an adult. However, her son recently got a girlfriend and has started going on home dates. When she returned home exhausted, she heard a woman's moans coming from her son's room, and "it just made me feel stupid," so she decided to stop being a mother. This time, she's finally showing off her footjob skills, which she learned thoroughly from her ex-boyfriend, who has a foot fetish! She's returning to her old self, the one who used to make men cum, and accepting another man's cock for the first time in 20 years.