ASHA is a Manga/Manhwa/Manhua in (English/Raw) language, Action series, english chapters have been translated and you can read them here. You are reading ASHA …
[Asha], the king of demons captured by humans. Asha, imprisoned in a prison tower, creates divisions between Crown Prince Jeongjin and General Muryang, and attempts to destroy them. A political battle, action, and unpredictable oriental fantasy unfolding against the backdrop of the imperial palace.