There are a lot of porn games that you can dress and customize our sexmate. But most of them don't even have a story or even good music.
I found 1 game that is also on ith.io, and the concept of the game is kinda similar due to our sexmate is a Robot.

My Maid Dreams of Electric Sheep.

• "My Maid Dreams of Electric Sheep" is a dystopian life simulation game with visual novel and dating-sim elements.
• "Ako is a Robot Maid" (Ako is her canon name.)