Sasakawa Kyoko, a 26-year-old office worker. She currently works for a major food company, handling overseas operations, which keeps her separated from her husband for long periods. The loneliness has become unbearable. Lately, they've only been able to meet once a month due to her demanding job, causing her stress to build up even more. She tries to cope by masturbating daily, but it's never enough to satisfy her longing. Her loneliness grows unbearable, pushing her to take drastic action. This work realistically portrays her emotional state and circumstances.