Three years ago, Hotaru had her heart set on Takano, the boss where she worked, but soon after she was posted as a project team member and left for Hong Kong. She decided to devote herself to her work. When she returns to Japan after finishing the project, she is then assigned to the First Planning Department where Takano is also working, and immediately begins to work as a team member. As the love development grows between Hotaru and Takano, the two start to seriously consider marriage..