"Poor Sumi Kitamura ... Her irresponsible older brother Eisuke keeps bringing home orphans for her to take care of even though they can barely afford teir own basic needs. Just when Sumi's financial problems become dire, wealthy Soichiro Ashida enters her life with a bizarre proposition - he'll provide her with the money she so desperately needs if she agrees to marry him. But can Sumi pull off fooling high society into thinking she's a proper lady?...

Kaguya doesn't remember who she is or why she has a huge scar on her back. Six months ago, she was found injured and unconscious in a field of bamboo. Now she works as a housekeeper and babysitter at a brothel, living her new life simply as "Kaguya." Kaguya's real identity is entwined with two men -- Hanzou, a handsome bodyguard of Okazaki Castle, and Hanzo, a leader of the ninja village of Iga. Between amnesia and mistaken identity, no one knows...

Sumi begins to regret running away with Nozomu and wonders if she loves him after all. Nozomu's love for her, however, is bordering on becoming an unhealthy obsession. When things heat up and Sumi's life is in danger, will Soichiro come to her rescue?

Pronouncing Sumi and Soichiro's marriage superficial, Nozomu becomes even more dogged in his quest to make Sumi his. As Nozomu teams up with Natsuki to bring Soichiro down, Soichiro finds his carefully arranged life unraveling before his very eyes ...

When Sumi asks Nozomu to stop buying the land where she and Soichiro live, he agrees, but only if she will leave Soichiro and become his wife instead, forcing Sumi to decide between living in poverty with Soichiro or in luxury with Nozomu.