Adult PC Game: Mariabelle's Land of Multidimensional Glory v1.1 by Kare Ido Sukoppu Eng Archive

Since the young master is getting to that age, Mariabelle decides to spend some time as a prostitute in order to increase her sex knowledge and become a Perfectly-Ultimate Super Maid. There's also some sort of unrest and lack of prostitutes in the Capital, so demand is high.
A generally light-hearted affair with a surprisingly robust story.​