10 titles recommended if you like Ooku: The Inner Chambers
My Happy Marriage
Bibliophile Princess
Basilisk
Yosuga no Sora
With You, Our Love Will Make It Through
Akame ga Kill!
The Fragrant Flower Blooms with Dignity
Raven of the Inner Palace
Aoi Bungaku Series
7th Time Loop: The Villainess Enjoys a Carefree Life Married to Her Worst Enemy!