紅霞後宮物語 (Series) favorite_border

[DeepL Translation - needs review] Although she was a woman, Kodama was renowned as the strongest soldier in the military. However, for some unknown reason, she, who was still single after turning 30, was chosen as the empress and entered the "Red Haze Palace," a back palace where women's jealousy and desires swirl...?　Winner of the 2nd Ranobe Literary Award.

(Translator: DeepL)