Maki Amamiya, a married woman who had been content with her ordinary daily life, begins a relationship with Shinji, a young man she met at a tennis school. Drawn to his honest and earnest affection, she rediscovers feelings of love she had nearly forgotten. One day, upon receiving a call from Shinji saying he's running a fever and can't move, Maki writes a false note to her husband and rushes to Shinji's place. Preparing to stay the night, she leaves home for the first time with a lie, driven by concern. This act marks a significant step forward in her life.