Ordinary housewife Masami lives with her husband Kenji, who struggles with sexual dysfunction. Because of this, their intimate nights have become infrequent, and Masami vents her sexual frustration on Kenji. One day, Kenji's former boss, Oshima, visits. Upon learning about Kenji's previous debts, Oshima forces Masami to repay with her body, crossing a line. Overwhelmed by guilt, Masami nonetheless finds herself aroused by Oshima's advances.
