Minako, who had lost her husband three years ago, smiled back after she recently attended a culture school, and her son Kenji was relieved. One day Kenji became aware. The culture school that Minako was attending is a culture school that teaches housewives specialties "constraints". Kenji, who saw her mother's "unbelievable figure" and the remaining "jobmarks" in her body, impulsively roped Minako.