Miyamoto is a career woman who excels at work and is admired by her juniors. However, she has little experience in romance, which has become a personal insecurity. Now in her thirties, she has thrown herself deeper into her job and achieved a promotion. Her juniors, Araki and Sawada, come to celebrate her success, warmly congratulating her. Miyamoto gratefully accepts their kindness and enjoys a pleasant evening together. But that night, Sawada invites her, saying, "Why don't we have a few more drinks?"—and a new development begins.