Adult PC Game: Amayui Castle Meister Final by Eushully Archive

Masters-technologists from ancient times knew how to create labyrinths and locks, as well as develop them in every way.
Our protagonist, named Avalo, wants to someday get his own workshop.
In order to make his dream come true and save some money, he explores various ancient ruins.
And so, during such an investigation, a collapse occurs in the ruins and he stumbles upon a girl named Fia, who was sleeping in a magic crystal.
Waking up, Fia declares to our young hero that she does not remember anything about herself, but no doubt she is the Goddess!
And thanks to her divine abilities, she can set all these ruins in motion.
And he talks about his goal, which she must fulfill at all costs.
After this incredible story, Fia says he does not mind if Avalo uses these ruins as a workshop.
But in return, he should help her fulfill her goal. Thus, our hero becomes the personal apostle of the self-proclaimed Goddess.
Rumors that the ruins had set in motion quickly spread throughout the kingdom.
And so, Avalo is drawn into a series of battles, during which he will have to find out the truth about the lost memory of the goddess.

Amayui Castle Meister Final by Eushully Gameplay Preview