Yotogi no Akujo: Hatsujou Taishitsu Reijou wa, Yogoto Koutei ni Aisareru

In a bid to support her financially troubled family, Carol enters the imperial court to join the harem for the young emperor. However, upon catching sight of the emperor during a party, she experiences a sudden, feverish sensation. As events unfold, bringing Carol closer to the emperor, it becomes apparent he harbors a hidden grudge against her. Despite being on opposing sides, they just can't resist the sweet heat in this thrilling otherworldly harem love story.

(Source: Kodansha, translated)