TSUKARETA OUJI-SAMA TO KYOUIKUGAKARI NO GOREIJOU NO HANASHI

Tsukareta Ouji-sama to Kyouikugakari no Goreijou no Hanashi summary:

Steven, the first prince of the Kingdom of Fierte, used to be called the perfect prince, but now he just spends his days drinking alone in his remote palace from noon onwards in a lethargic mood.
One day, a woman of his age named Ada, the daughter of the Duchess of Raffine, suddenly arrives at his doorstep.
At first, Steven was not pleased with her, but gradually he begins to open up to her.
In the midst of his life, Stephen begins to remember memories of his childhood with Ada...?