When Yuu's father's factory catches fire and is on the verge of bankruptcy, Tatsuro, the president of a business partner, offers a loan on the condition that his son Makoto marry Yuu. Yuu, who had no choice but to agree to the terms and marry her, ends up living a busy life taking care of Tatsuro, who has fallen ill, and doing housework. One day, Makoto, who has a domineering personality, picks on Yuu and ends up using her as a plaything. Tatsuro finds Yuu lying limp and gently takes care of him, but there is a lewd glint deep in his eyes...