Yukiko is on her way to meet Boss Gunji. Judging by her appearance, no one would suspect that this beautiful young woman, sitting quietly in a suburban train, is the only woman able to beat the best professional players in Japan; or that she is wearing the tattoo of the man that loved her and died for her...

The shogun's vassal Harima Aoyama and a chamber maid are in love with each other, but they cannot be together due to a difference of their status. Soon, an offer of marriage is brought to Harima. Trying to test his love, Okiku breaks one of the plates of the family treasure of the Aoyama family, but Harima doesn't notice. However, someone surrounding her witnesses the moment Okiku breaks the plate on purpose.

A maiden is murdered by a mysterious ninja, unfortunately two young ladies witness this, good thing the bored Lord is walking by, he saved the girls but was too late to save the maiden, quickly he finds himself mixed up in a mystery of murdered maidens, an unknown ninja clan, attempted assassinations towards himself and a cursed vampire bat cave, can the bored Lord solve this puzzle before maidens lose their lives?