Cursed Words and the Azure Tower
Prince Oscar, heir to the throne of Farsas, was cursed in his childhood - a curse that prevents him from producing an heir. His last chance is the help of the Witch of the Azure Moon, but she lives in a gigantic azure tower that harbors many dangers...
Aired 03/04/2024EP 1 - Cursed Words and the Azure Tower

2024
Unnamed Memory
"My wish as champion is for you to descend the tower and be my wife."
Seeking to end a curse thwarting his lineage, Prince Oscar sets out on a quest that leads him to a powerful and beautiful witch, Tinasha, and he demands a unique bargain: marriage. Though unenthused by the proposal, she agrees to stay in his castle for a year while researching the spell cast upon him. But beneath her beauty lies a lifetime of dark secrets that soon come to light.
(Source: Yen Press, Crunchyroll)