With the Sheikh in His Harem Vol. 4 (Kodansha, 2021)

Now that she's formally married to Prince Lui of Armadia, average high-schooler Sanagi is far from average any longer. But now Lui's harem is invaded by Aila, a powerful, well-connected girl seeking to be his concubine! What's more, they're now all traveling to the countryside-along with Prince Adil, Lui's top political rival! Can Sanagi and Lui's love survive this maelstrom of romance unscathed? The four-way web of royal love grows ever more intense in Volume 4!