Monochrome Mobius: Rights and Wrongs Forgotten

Monochrome Mobius: Rights and Wrongs Forgotten is set prior to the events in Utawarerumono: Mask of Deception.[2] In the province of Ennakamuy that borders the Yamato Empire, the story follows Oshtor, who resides with his mother and younger sister. During an investigation assigned by his local lord, Oshtor encounters a mysterious girl by the name of Shunya who informs him that his father currently believed to be deceased is still alive. Shocked by this revelation, but catching a vestige of his father in Shunya and his determination to find the truth, Oshtor partners up with her and the pair travel to a country that cannot be found on the map, Arva Shulan, beginning the pursuit of his father.

Source: TheGamesDB