The point of the game is to train your own made maid through specific activities (mostly H). Depending on what you decide to do with her, her stats will change and she also gain experience and levels both overall and in that specific activity. Higher girl’s levels raise stats (e.g. endurance during H) and unlock clothes, while higher specific skill levels unlock more skills and activities (e.g. high levels of SM skills add SM activities to many other basic skills).
The game’s time is split up into days. At the start of each day you can talk to the maid, go to the playroom with her (start H) and take a maid examination (raise maid rank, unlock clothes and raise important stats).
If you chose to talk to the maid you enter the club and can make her dance on stage (no specific effect on the maid), cosplay (change her clothes), talk to her (affects personality) or just go to the playroom.
To finish the story part of the game and continue with the infinite mode you need to get your maid to rank 11 by day 20. From then on you can do what ever you want and create more maids.