Tenryuu Maru

During the Edo period, a humble young man, Keita, embarks on a journey in search of his sister, who has been kidnapped by a god. Accompanying him is his sister's husband, Tenmaru. Keita is earnest and has a strong sense of justice, while Tenmaru is carefree and innocent, a former dragon god feared by the people. The two are polar opposites, and their relationship is strained only by their love for their respective sister and wife. A fantastical period drama from the author of Naraku no Exorcist!

(Source: Hakusensha, translated)