Legend of Basara

Season 1, Episode 2: The Destined Enemy - The Red King

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With the help of Ageha, Sarasa set out to proclaim her brother's sword which had been stolen by the Red King's Army and injured herself in the process. While bathing in a nearby hot spring, she met a mysterious guy named Shuri, who's instantly attracted to her. Unknown to her, Shuri is actually the Red King himself as well as vice versa