Ordeal of Princess Eris, a hentai RPG developed by circle Asakiyumemishi and published by Kagura Games. Originally released on December 26, 2015. English localization released on June 6, 2019. Download on DLSite.com for $13.00. For PC Windows. No voice acting.
After her kingdom is invaded and her father is murdered, Princess Eris has no choice but to flee to the land of Arclight. She works hard to become strong enough to retake her throne and defeat the evil Flosein Empire!
Source: N4G PC [NSFW] Hentai Game Review: Ordeal of Princess Eris