Sachika moves from Osaka to Tokyo to celebrate her husband's independence and start a new life. Although she once dreamed of living in Tokyo, reality sets in as she finds herself with few friends and increasingly lonely. Her husband is busy with work, leaving her feeling more isolated by the day. One day, while her husband is away on a business trip, Sachika finishes dinner alone. On a whim, she wanders into a bar and meets a man named Jun. This chance encounter awakens desires she had long suppressed, pulling her into a world of infidelity and forbidden romance. In this new environment, she begins to confront her own emotions and longings.