Kuroki Hane Mau Sakyuu de

Searching for her missing brother, journalist Lynn Fisher sneaks into Jantar, a small country surrounded by deserts. As she investigates the king’s palace, she is caught by the guards. The new king is Kasim, a man rumored to have inherited the throne by murdering his older brother. Kasim makes a proposal to the wary Lynn. “Rather than being executed, become my mistress!” The journalist, imprisoned in the harem with the hard-hearted king! Where will fate take these two colliding spirits?!

(Source: Jmanga)