Onihei side story: The Final Chapter - The Fourth Wife.

Inomatsu, a carpenter with a reputation as a skilled craftsman, has a wife named Oritsu. Oritsu is deeply in love with Inomatsu and believes that the purpose of her life is to devote herself to her husband day and night. However, Oritsu is Inomatsu's fourth wife. In fact, he is a robber and thief. As a carpenter, Inomatsu usually sneaked into merchants' houses and carried out robberies. For him, wives are just a tool to deceive the public...